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refractory materials borides and carbides using method

  • THE ANALYSIS OF REFRACTORY BORIDES, CARBIDES,

    2021-6-26 · Methods are presented for the analysis of 41 refractory materials. An evaluation of the accuracy and the precision of these techniques are also given The materials studied are the borides of hafnium, molybdenum, niobiumL rhenium, tantalum, thorium, titanium, tungsten, uranium vanadium, and zirconium; the carbides of hafnium molybdenum, miobium, ...

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  • Process for preparing refractory borides and carbides ...

    A method for the preparation of a refractory boride or carbide which comprises contacting a metal chloride, said metal chloride undergoing reduction on reaction with an alkali metal, or silicon tetrachloride with boron trichloride or carbon tetrachloride in a solvent unreactive with said alkali metal and said chlorides in the presence of an alkali metal, said metal chloride or silicon tetrachloride and said boron …

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  • Handbook of refractory carbides and nitrides:

    1997-12-31 · A carbide and carbonitride surface treatment method for refractory metals is provided, in steps including, heating a part formed of boron, chromium, hafnium, molybdenum, niobium, tantalum, titanium, tungsten or zirconium, or alloys thereof, in an evacuated chamber and then introducing reaction gases including nitrogen and hydrogen, either in elemental or water vapor form, which react with a source of elemental carbon to form carbon-containing gaseous reactants which then react with …

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  • Boron and refractory borides (Book) | OSTI.GOV

    2021-5-28 · A method is described for the preparation of a refractory boride or carbide which comprises contacting a metal chloride. The metal chloride undergoes reduction on reaction with an alkali metal, or silicon tetrachloride with boron trichloride or carbon tetrachloride in a solvent unreactive with the alkali metal and the chlorides in the presence of an alkali metal.

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  • Method of dry-soldering highly refractory materials ...

    The invention provides a method of joining highly refractory surfaces composed of binary compounds selected from the group consisting of carbides, borides, nitrides and silicides with another material, such as a metal, by dry-soldering techniques.

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  • Borides and Carbides of Transition Elements

    2020-5-23 · Abstract: Oxides, borides and carbides of the transition elements are materials of great interest from a technologic point of view. Many of these materials are used in the form of thin films, so several techniques are commonly used to deposit them. …

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  • Method for making ceramic matrix composites using ...

    The present invention provides a method for making a ceramic matrix composite comprising forming an infiltrated fiber reinforcement by infiltrating a plurality of plies of a fibrous material with a precursor polymer which decomposes to a substantially pure product selected from the group consisting of a refractory metal carbide and a refractory metal boride, and exposing the infiltrated fiber reinforcement to conditions …

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  • The wetting of refractory carbides, borides, and

    The investigation has shown that the wetting of refractory compounds by metals is directly linked with the character of their chemical reaction, as well as with the direction of preferential transport of elements, from the melt to the refractory support or vice versa. The wetting of a support material by a melt can be controlled by means of additions to one of the contacting materials, which ...

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  • HOW TO CLASSIFY REFRACTORY MATERIALS - idc

    2019-2-4 · refractory materials. These refractories are produced from Chinaclay, Asbestos (Kieselguhr), Glass wool, Mica (Vermiculite), Bubble alumina, Carbon, Paper wool, Ceramic fibers, Saw dust etc. Cermets. Under this category come the refractories produced from the mixtures of high purity Refractory Oxides, Carbides, Borides, and Metals or Alloys.

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  • ESTIMATION OF HEAT CAPACITIES AND OTHER ... -

    Factors that contribute to the heat capacities of solids are analyzed and correlation methods are developed for accurately estimating these factors for the refractory borides, carbides, nitrides, and oxides. High temperature heat capacities calculated for the borides …

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  • Use of refractory oxides, carbides and borides as

    1987-5-3 · Nuclear Instruments and Methods in Physics Research B26 (1987) 183-189 North-Holland, Amsterdam 183 USE OF REFRACTORY OXIDES, CARBIDES AND BORIDES AS TARGETS FOR ON-LINE MASS SEPARATION H.L. RAVN 1), T. BJ0RNSTAD 2), P. HOFF 3), O.C. JONSSON 1>, E. KUGLER1', S. SUNDELL, B. VOSICKI 1) and the ISOLDE Collaboration 1) CERN-ISOLDE, Geneva, …

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  • Thermal stability of refractory carbide/boride

    2002-4-1 · 1.. IntroductionAdvanced materials with temperature capability of over 2000. °C are needed for ultra-high temperature structural applications, such as rocket engines and thermal protection systems for space vehicles.. The potential ceramic systems that can operate as oxidation-resistant materials with temperature capabilities from 2000 to 2400 °C are refractory oxides, carbides, borides and ...

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  • Processing of Refractory Metal Borides, Carbides and ...

    Transition metal borides, carbides and nitrides are candidates for very high temperature applications. A review of various processing techniques to fabricate dense monolithic and composite materials is presented. In particular, we focus on reactive hot pressing (RHP) which allows synthesis and densification to be achieved simultaneously. We report the RHP of composites in the Ti-B-N, Zr-B-C ...

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  • Studies of refractory carbides, nitrides, and borides as ...

    Thermionic emission properties of several kinds of refractory carbides, nitrides, and borides of the transition metals in the form of powder were investigated with a newly developed measuring device and evaluated by the figure of merit defined as the ratio of the effective work function to the working temperature at which the vapor pressure becomes 1 x 10(-5) Torr.

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  • Studies of refractory carbides, nitrides, and borides as ...

    Abstract Thermionic emission properties of several kinds of refractory carbides, nitrides, and borides of the transition metals in the form of powder were investigated with a newly developed measur...

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  • Method of dry-soldering highly refractory materials ...

    Highly refractory binary ceramic materials such as carbides, borides, nitrides and silicides are joined to another material by forcing a solder material which includes therein at most 1 at. ‰of an active metal such as Al, Ba, Ce, Cr, Hf, Mo, Nb, Ni, Ta, Ti, Zr, etc. into intimate contact with the ceramic and then heating the so-formed couple to a temperature sufficiently high for a solid ...

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  • The hardness at high temperatures of some refractory ...

    35& JOURNAL OF THE LESS-COMMON METALS THE HARDNESS AT HIGH TEMPERATURES OF SOME REFRACTORY CARBIDES AND BORIDES L. M. FITZGERALD* Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge (Great Britain) (Received December 24th, 1902) SUMMARY A new method has been used to measure the hardness of material with high melting points at …

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  • Determination of impurities in refractory borides ...

    The X-ray fluorescence method using calibration curve, log(I/C)= A(logE) 2 + B(log E) +D (I=X-ray intensity, C=concentration of elements and E=X-ray energy), has been successfully applied to determine impurities in refractory borides, carbides and nitride

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  • Electrodeposition of refractory compounds from

    Electrodeposition of refractory compounds from molten salts — borides, carbides and silicides. Authors; Authors and affiliations ... the plating of a substrate by a refractory compound. This method has something in common with the preceding methods; it requires plating a refractory metal, and it also resembles metalliding in that a refractory ...

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  • Ultra-High Temperature Materials II - Refractory

    Ultra-High Temperature Materials II Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) Authors: ... Re, Os, Ta, Mo, Nb, Ir) and compounds (oxides, nitrides, carbides, borides, silicides) with melting points in this range. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The reader is ...

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  • Use of refractory oxides, carbides and borides as

    Ion beams of a number of elements have been produced at the CERN-ISOLDE facility by 600-MeV proton bombardment of thick targets consisting of a variety of metal oxides, carbides and borides. The nuclear reaction products are released from the target material at high temperature and continuously transferred to the ion source of the ISOLDE on-line mass separator.

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  • Processing of Refractory Metal Borides, Carbides and ...

    Transition metal borides, carbides and nitrides are candidates for very high temperature applications. A review of various processing techniques to fabricate dense monolithic and composite materials is presented. In particular, we focus on reactive hot pressing (RHP) which allows synthesis and densification to be achieved simultaneously. We report the RHP of composites in the Ti-B-N, Zr-B-C ...

    Get Price
  • Electrodeposition of refractory compounds from

    Electrodeposition of refractory compounds from molten salts — borides, carbides and silicides. Authors; Authors and affiliations ... the plating of a substrate by a refractory compound. This method has something in common with the preceding methods; it requires plating a refractory metal, and it also resembles metalliding in that a refractory ...

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  • NANO-CRYSTALLINE REFRACTORY METAL CARBIDES,

    NANO-CRYSTALLINE REFRACTORY METAL CARBIDES, BORIDES OR NITRIDES WITH HOMOGENEOUSLY DISPERSED INCLUSIONS . United States Patent Application 20190225548 ... or a refractory metal hydride, an organic compound having carbon and hydrogen, and a filler material. Multilayered materials are also disclosed. Inventors: Dyatkin, Boris (Washington, DC, US) ...

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  • Determination of impurities in refractory borides ...

    The X-ray fluorescence method using calibration curve, log(I/C)= A(logE) 2 + B(log E) +D (I=X-ray intensity, C=concentration of elements and E=X-ray energy), has been successfully applied to determine impurities in refractory borides, carbides and nitride

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  • Fusion method for sample preparation for isotopic ...

    Various refractory samples of boron such as titanium borides, rare earth borides, boron carbides having natural and non-natural isotopic composition were analysed by thermal ionization mass spectrometry as Na 2 BO 2 + ions. Samples were fused with Na 2 CO 3 directly on the filament after adjusting the B/Na mole ratio to 2 and in certain cases modifications in the loading technique were ...

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  • Materials Science of Carbides, Nitrides and Borides |

    Materials Science of Carbides, Nitrides and Borides. Editors: Gogotsi, Yury G., Andrievski, R.A. (Eds ... Roughly equal numbers of papers cover theoretical and experimental research in the general field of materials science of refractory materials. Audience: Researchers and graduate students in materials …

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  • Download Carbide Nitride And Boride Materials

    2012-12-6 · Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader.

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  • Metal Immiscibility Route to Synthesis of Ultrathin ...

    the family of metal carbides, nitrides and borides, noted for their hardness, wear resistance and high temperature stability, offers much promise.[6] Here we study a unique and generic approach to synthesis of ultra-thin transition metal carbides (TMC), nitrides and borides with properties ... This method of growing ultra-thin materials (metal ...

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  • (PDF) Joining of ultra-refractory carbides | Laura ...

    One of the The ultra-refractory carbides, ZrC, HfC and TaC are crys- current areas of intense interest is the use of these materi- talline compounds based on a host metal that is generally als, primarily HfC-based materials, as rocket nozzles in the arranged in a close-packed structure and carbon that occupies aerospace sector.

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  • bulletin Commercially scalable, single-step polymer ...

    2020-9-8 · to synthesize near net shape refractory metal carbides, borides, and nitrides using a single-step in situ reaction bonding method. Commercially scalable, single-step polymer-derived reaction bonding synthesis of refractory ceramics T he unique essence of the “refractory ceramic” class of materials lies in the first word of the term: refractory.

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  • Studies of refractory carbides, nitrides, and borides as ...

    Abstract Thermionic emission properties of several kinds of refractory carbides, nitrides, and borides of the transition metals in the form of powder were investigated with a newly developed measur...

    Get Price
  • Use of refractory oxides, carbides and borides as

    Ion beams of a number of elements have been produced at the CERN-ISOLDE facility by 600-MeV proton bombardment of thick targets consisting of a variety of metal oxides, carbides and borides. The nuclear reaction products are released from the target material at high temperature and continuously transferred to the ion source of the ISOLDE on-line mass separator.

    Get Price
  • Method for making a film of refractory material

    New York, New York; published by John Wiley and Sons, Inc.; 'Chemically Deposited Nonmetals,' Chapter 11, pp. 343-420), typical thin film refractory materials that can be made by the method disclosed herein are boron; silicon; refractory carbides, borides, and nitrides of silicon, titanium, zirconium, hafnium, vanadium, niobium, and tantalum ...

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  • [PDF] Materials Science Of Carbides Nitrides And

    Materials Science of Carbides Nitrides and Borides Book Description : A survey of current research on a wide range of carbide, nitride and boride materials, covering the general issues relevant to the development and characterisation of a variety of advanced materials.

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  • Spark plasma sintering of ultra refractory compounds ...

    2008-7-30 · Spark plasma sintering experiments were conducted on Zr- and Hf-based borides and carbides with the addition of 1, 3, and 9 vol% MoSi2 as sintering aid. For comparison, as-received ZrC, HfC, ZrB2, HfB2 powders were also sintered. The microstructural features were investigated by means of scanning electron microscop–energy dispersive spectroscopy technique. Silicon carbide was detected …

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  • Preparation of finely-divided refractory powders of

    1. In the process of producing finely-divided refractory powder selected from the group consisting of borides, carbides, silicides, nitrides and sulfides of a metal selected from groups III-V of the Periodic Chart of the Elements by vapor phase reaction in a reactor of a halide of the selected metal and a source of boron, carbon, silicon, nitrogen or sulfur respectively as reactants, wherein ...

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  • Part I: Theoretical predictions of preferential oxidation ...

    2020-9-15 · High entropy materials, which include high entropy alloys, carbides, and borides, are a topic of substantial research interest due to the possibility of a large number of new material compositions that could fill gaps in application needs. There is a current need for materials exhibiting high temperature stability, particularly oxidation ...

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  • China Carbides And Borides, Carbides And Borides ...

    China Carbides And Borides manufacturers - Select 2021 high quality Carbides And Borides products in best price from certified Chinese , suppliers, wholesalers and factory on Made-in-China.com

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  • High temperature, refractory materials, bricks, fibers ...

    REFRACTORY. Refractories are primarily in-organic ceramic materials designed to withstand very high temperatures (>1000 °F) encountered in the manufacturing process. Refractories have higher heat resistance than metals and alloys and are resistant to thermal stress, physical wear, and corrosion. Hence they find wide applications in oil and gas ...

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  • Processing of refractory metal borides, carbides and ...

    Transition metal borides, carbides and nitrides are candidates for very high temperature applications. A review of various processing techniques to fabricate dense monolithic and composite materials is presented. In particular, we focus on reactive hot pressing (RHP) which allows synthesis and densification to be achieved simultaneously. We report the RHP of composites in the Ti-B-N, Zr-B-C ...

    Get Price
  • UNTRADITIONAL SYNTHESIS OF BORON-CONTAINING

    2020-11-5 · REFRACTORY MATERIALS - A REVIEW B. Agyei-Tuffour1,2, E. Annan1,2, ... The method of activated pressureless sintering of dense superhard B 4 ... some ceramics such as borides or carbides Radev and Klissurski, (2001). Besides the economic benefits, combustion synthesis is a relatively simple and non contaminant method for producing powders of ...

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  • Synthesis and Characterization of an Alumina Forming ...

    2016-5-25 · Binary transition metal borides and carbides are among the hardest and most refractory materials known. In addition, many of them have a unique combination of mechanical, electronic, and thermal properties that make them technologically important for applications such as wear resistant coatings 1, primary battery electrodes 2,3,

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  • Download Carbide Nitride And Boride Materials

    2012-12-6 · Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader.

    Get Price
  • Stability of reactive and refractory metal borides in ...

    Abstract Dispersion hardening by the Group IVb and Vb metal carbides has been demonstrated to improve the high temperature strength of chromium significantly 1 , and has created interest in the similar use of the borides of these metals. The purpose of this work was to characterize the elevated temperature formation and stability of these borides in chromium-base alloys, about which little is ...

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  • US6627126B2 - Method for preparing refractory

    A method for preparing a refractory carbide component includes the steps of providing a carbon rich polymer precursor to silicon carbide and excess carbon, determining an amount of excess carbon in the carbon rich polymer precursor, combining the carbon rich polymer precursor with a selected amount of refractory metal to form a precursor/metal mixture, the selected amount being selected so as ...

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  • Method for Forming Fiber Reinforced Composite

    1999-8-31 · Method for Forming Fiber Reinforced Composite Bodies with Graded Composition and Stress Zones A near-net, complex shaped ceramic fiber reinforced silicon carbide based composite bodies with graded compositions and stress zones is disclosed. To provide the composite a fiber preform is first fabricated and an interphase is applied by chemical vapor infiltration, sol-gel or polymer processes.

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  • Analysis of γ′ Precipitates, Carbides and Nano-Borides

    2013-12-18 · We study the solubility of the nanopowders of borides and carbides of metals of groups IV–VIB and a nanopowder of silicon carbide in standard nickel-plating electrolytes. As objects of investigation, we use nanopowders containing 91.8–97.6% of the main phase with average particle sizes of 32–78 nm. Their corrosion resistances are evaluated as functions of the acidity of electrolyte ...

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  • Corrosion Resistance of Nanopowders of Borides and ...

    2017-12-22 · A potential, environmentally friendly production process for refractory metal carbides is investigated whereby methane is used as the reducing agent for many oxides. Using the most recently available thermodynamic data, the optimum conditions for production of binary and ternary carbides, together with hydrogen-rich gases, have been calculated.

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  • Friction and wear of radiofrequency-sputtered borides ...

    The friction and wear properties of several refractory compound coatings were examined. These compounds were applied to 440 C bearing steel surfaces by radiofrequency (RF) sputtering. The refractory compounds were the titanium and molybdenum borides, the titanium and molybdenum silicides, and the titanium, molybdenum, and boron carbides.

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  • UNTRADITIONAL SYNTHESIS OF BORON-CONTAINING

    2020-11-5 · REFRACTORY MATERIALS - A REVIEW B. Agyei-Tuffour1,2, E. Annan1,2, ... The method of activated pressureless sintering of dense superhard B 4 ... some ceramics such as borides or carbides Radev and Klissurski, (2001). Besides the economic benefits, combustion synthesis is a relatively simple and non contaminant method for producing powders of ...

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  • LOS ALAMOS SCIENTIFIC LABORATORY

    2020-1-14 · Refractory borides, carbides, nitrides, and silicides are extremely hard, and attempts to reduce the particle size of these samples in the usual type of mortar results in significant contamination. This difficulty can be eliminated by using a 'diamond mortar.' All samples are reduced

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  • Carbides | Introduction to Chemistry

    In this respect, boron carbide is similar to the boron-rich borides. Both silicon carbide (also known as carborundum) and boron carbide are very hard and refractory materials. Both materials have important industrial applications. Interstitial Carbides. Interstitial carbides describe the carbides of the group-IV, -V, and VI transition metals.

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  • Download Carbide Nitride And Boride Materials

    2012-12-6 · Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader.

    Get Price
  • Stability of reactive and refractory metal borides in ...

    Abstract Dispersion hardening by the Group IVb and Vb metal carbides has been demonstrated to improve the high temperature strength of chromium significantly 1 , and has created interest in the similar use of the borides of these metals. The purpose of this work was to characterize the elevated temperature formation and stability of these borides in chromium-base alloys, about which little is ...

    Get Price
  • Ultra-High Temperature Materials II: Refractory

    Ultra-High Temperature Materials II: Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) Igor L. Shabalin. 0 ... Re, Os, Ta, Mo, Nb, Ir) and compounds (oxides, nitrides, carbides, borides, silicides) with melting points in this range. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The ...

    Get Price
  • Ultra-Short Pulsed Laser Deposition of Oxides, Borides

    Oxides, borides and carbides of the transition elements are materials of great interest from a technologic point of view. Many of these materials are used in the form of thin films, so several techniques are commonly used to deposit them. Among these techniques, Pulsed Laser Deposition (PLD) performed using ultra-short pulse lasers, mainly fs lasers, presents unique characteristics in respect ...

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  • An alternative, environmentally friendly production ...

    2017-12-22 · A potential, environmentally friendly production process for refractory metal carbides is investigated whereby methane is used as the reducing agent for many oxides. Using the most recently available thermodynamic data, the optimum conditions for production of binary and ternary carbides, together with hydrogen-rich gases, have been calculated.

    Get Price
  • Refractory Material Testing - Lab Testing Services for ...

    2020-3-5 · Refractory materials are basically inorganic non-metallic substances. ... Oxides of silicon, aluminium, magnesium, calcium and zirconium, and some non-oxide compounds of carbides, nitrides, borides, silicates and graphite. There are a number of different types of refractory materials, in terms of physico-chemical composition and designs, which ...

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  • Synthesis of polymeric precursors for refractory

    2014-12-1 · Free Online Library: Synthesis of polymeric precursors for refractory carbides and borides.(56TH ANNUAL SYMPOSIUM OF THE IDAHO ACADEMY OF SCIENCE: THEME: ENERGY, MATERIALS, AND NANOTECHNOLOGY, Brief article, Abstract) by 'Journal of the Idaho Academy of Science'; Science and technology, general Boron compounds Chemical properties Carbides …

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  • Combustion joining of refractory materials:

    2009-8-31 · various layer compositions including refractory borides (TiB 2 and ZrB 2), 7 carbides (SiC, B 4 C, and WC), 6–9 or their mixtures (TiB 2 +SiC+B 4 C), 7 relying on the solid-state diffusion bonding mechanism. Though relatively strong bonding is achieved, this method suffers from dis-tinct shortcomings. It requires long (hours), high-

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  • Technology of production of hafnium carbide, etc ...

    2012-12-6 · Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader.

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  • Download Carbide Nitride And Boride Materials

    2020-8-6 · results under similar conditions for carbides, nitrides, and borides of known bonding, the chemical bonding for these group IVA transition-metal refractories is discussed with reference to the theories described by Engel (ref. 1) and Samsonov (ref. 2). diborides of titanium (Ti) and zirconium (Zr). In general, three aqueous systems

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  • CHEMICAL REACTIONS OF CARBIDES, NITRIDES,

    Bulk samples of equiatomic, hexanery (5-metal), high-entropy refractory carbides were fabricated using a combination of high-energy ball milling (HEBM), spark plasma sintering (SPS), and hot pressing (HP) annealing. To select candidate composition that are likely to form single phase high-entropy materials at lower processing temperatures (<2500°C), a novel, first-principles materials design ...

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  • Modelling and synthesis of high-entropy refractory

    2020-3-5 · Refractory materials are basically inorganic non-metallic substances. ... Oxides of silicon, aluminium, magnesium, calcium and zirconium, and some non-oxide compounds of carbides, nitrides, borides, silicates and graphite. There are a number of different types of refractory materials, in terms of physico-chemical composition and designs, which ...

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  • Refractory Material Testing - Lab Testing Services for ...

    Oxides, borides and carbides of the transition elements are materials of great interest from a technologic point of view. Many of these materials are used in the form of thin films, so several techniques are commonly used to deposit them. Among these techniques, Pulsed Laser Deposition (PLD) performed using ultra-short pulse lasers, mainly fs lasers, presents unique characteristics in respect ...

    Get Price
  • Ultra-Short Pulsed Laser Deposition of Oxides, Borides

    2019-5-6 · reported in systems like high entropy borides [6] and high entropy carbides [7,8]. Compared with conventional ceramic materials, single phase HECs show superior mechanical properties contributed by the strain strengthening e ect from lattice distortion. For example, the high-entropy carbide fabricated

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  • Processing and Characterization of Refractory

    There is a scatter in the data on the melting temperature of refractory materials even in the case of sufficiently pure materials [1]. Often tabular data differ from each other by 300K or more (for example, in the case of TiB 2).Therefore, it is relevant to clarify the melting point from first principles, without using of experimental data.

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  • High Temperature Boride and Carbide Ceramics for

    2019-5-9 · Borides and Carbides as DPE Electrodes Borides and carbides are attractive DPE electrode materials High melting temp (≥ ~3000 °C) Thermal and electrical conductivities comparable to some metals (e.g., ~10. 5. S/cm for HfB. 2) Good thermal shock resistance Resistance to plasma sparks and arcs Limitations with borides and carbides as DPE ...

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  • Formation and reactivity of borides, carbides and ...

    Borides, carbides and silicides are reviewed with special reference to newer production methods and fabrication techniques. Crystal structures and types of bonding in binary and ternary compounds are classified and discussed. ... International Journal of Refractory Metals and Hard Materials, 10.1016/j.ijrmhm.2016.02.005, 57, (31-41), (2016 ...

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  • Download Carbide Nitride And Boride Materials

    2012-12-6 · Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader.

    Get Price
  • Ultra-High Temperature Materials II: Refractory

    Ultra-High Temperature Materials II: Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) Igor L. Shabalin. 0 ... Re, Os, Ta, Mo, Nb, Ir) and compounds (oxides, nitrides, carbides, borides, silicides) with melting points in this range. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The ...

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  • Mechanical Properties of Particulate Reinforced SiC

    The electric conductivity of the composites can be varied by changing the amount of carbides, nitrides or borides of transition metals. Use of refractory compounds/SiC composites may solve two problems: low fracture toughness of ceramic materials and difficulty of machining them by using an electric discharge method.

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  • What is Borides Powder?-Mis-aisa-The latest

    2021-6-30 · Preparation method of Borides Powder The main method of making refractory metal Borides Powder is 1.The reaction formula of metal and boron directly combined at high temperature is Me+B----MeB 2.Reducing the mixture of metal oxide and boric anhydride with carbon is 2MeO+B2O3+5C—2MeB+5CO

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  • Combustion joining of refractory materials:

    The combustion-joining (CJ) method, which will be described further, is an attractive approach for bonding refractory materials. Advances in materials joining using combustion phenomena have been discussed in detail in a recent review. Reference Mukasyan and White 4

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  • Simple synthesis of nano-sized refractory metal

    2011-5-5 · Simple synthesis of nano-sized refractory metal carbides by combustion process Simple synthesis of nano-sized refractory metal carbides by combustion process Won, Hyung; Hayk, Nersisyan; Won, Chang; Lee, Hyuk 2011-05-05 00:00:00 J Mater Sci (2011) 46:6000–6006 DOI 10.1007/s10853-011-5562-0 Simple synthesis of nano-sized refractory metal carbides by combustion process • • • Hyung Il …

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  • Single crystals of carbides and borides as electron ...

    Single crystals of carbides and borides as electron emitters @article{Otani1992SingleCO, title={Single crystals of carbides and borides as electron emitters}, author={S. Otani and Y. Ishizawa}, journal={Progress in Crystal Growth and Characterization of Materials}, year={1992}, volume={23}, pages={153-177} } S. Otani, Y. Ishizawa

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  • Vaporization behavior of non-stoichiometric

    Transition metal and actinide carbides, such as ZrC or NbC and UC or ThC, exhibit a wide range of stoichiometry, and therefore vaporize incongruently. At long times, steady state vaporization can be achieved where relative concentrations of atomic species on solid surface equals that in the gas phase. The surface composition under these steady state conditions is termed the congruently ...

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  • Technology of refractory materials and heat insulating ...

    2020-10-15 · METHOD OFR TESTING AND CHARACTERISTICS OF REFRACTORY ... The highest melting temperatures from the well-known compounds have got carbides, nitrides, borides and oxides. From these oxides listed above only six oxides are of great significance ... Non-oxide ones carbon-based refractory materials, and carbides, nitrides, borides, silicides ...

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  • Preparation of Ceramics, Cermets, Nitrides, Borides and ...

    2013-2-4 · Table 1 shows one approach to preparing very hard oxides, carbides, cermets and nitrides. Specimens are cut with the precision saw using diamond tipped wafering blades and are then mounted in a polymeric resin for ease of handling and identification. The method in Table 1 uses two resin-bonded diamond grinding discs (DGD) and then uses

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  • Ultra-High Temperature Materials II: Refractory

    Ultra-High Temperature Materials II: Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) Igor L. Shabalin. 0 ... Re, Os, Ta, Mo, Nb, Ir) and compounds (oxides, nitrides, carbides, borides, silicides) with melting points in this range. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The ...

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  • High-entropy high-hardness metal carbides

    2018-9-25 · These allows using them to produce cathodes for electrolytic aluminium, first wall coatings and neutron absorbers for nuclear technology, valve components in cool liquefaction plants and crucible materials for metal evaporation. Studies on the TiB2-TiC and TiB2-TaC systems show that the carbides …

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  • New Superhard Ternary Borides in Composite Materials

    2020-8-6 · than refractory compounds (carbides, nitrides, and borides). differences in the thermodynamic stability of the materials, refractory com- pounds in tungsten materials have been as strong at elevated temperatures as materials containing oxides (ref. 3). Because tungsten must be processed at

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  • TECHNICAL NOTE 2751

    2021-3-23 ·  Designing better ballistic materials: Reduced ... I noticed a growing number of articles on high-strength carbides and borides. Because ceramic armor is an application ... authors attempted to fabricate high‐performance B 4 C‐TiB 2 ‐SiC composites with a special toughening structure by using a new reactive hot-pressing method.

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  • Designing better ballistic materials: Reduced

    2020-4-5 · Abstract. The methods of synthesis of refractory carbides, borides, nitrides, and oxides in the form of ultradisperse powders, consolidated materials, and films with a grain size less then 100 nm are examined. Information about the properties of nanocrystalline refractory compound s is described systematically and discussed.

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  • The synthesis and properties of nanocrystalline refractory ...

    2018-4-18 · Bulk samples of equiatomic, hexanery (5-metal), high-entropy refractory carbides were fabricated using a combination of high-energy ball milling (HEBM), spark plasma sintering (SPS), and hot pressing (HP) annealing. To select candidate composition that are likely to form single phase high-entropy materials at lower processing

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  • MODELING AND SYNTHESIS OF HIGH-ENTROPY

    2001-7-5 · The most important materials systems have been grouped as oxides and nitrides, carbides, borides, silicides and aluminides. The general properties that make them useful as refractory coatings, along with specific materials and applications, have been reviewed.

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