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refractory materials borides and carbides specifications

  • 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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  • Handbook of refractory carbides and nitrides:

    1997-12-31 · THE ANALYSIS OF REFRACTORY BORIDES, CARBIDES, NITRIDES, AND SILICIDES. Technical Report Kriege, O H. 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 ...

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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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  • 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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  • 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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  • Development of Refractory and Rare Earth Metal

    2016-1-1 · Among the non-oxide ceramics, carbides and borides such as B 4 C, TiB 2, ZrB 2, HfB 2, NbB 2, CrB 2, LaB 6, CeB 6, NdB 6, EuB 6 posses attractive combination of high temperature properties for engineering applications. However, they are difficult to synthesize and fabricate in the form of dense bodies, because of their refractory nature and low self diffusion coefficient.

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  • Process for preparing refractory borides and carbides ...

    Refractory borides or carbides are prepared by contacting an alkali-metal ducible metal chloride or silicon tetrachloride with boron trichloride or carbon tetrachloride in an inert solvent in the presence of an alkali metal, the metal chloride or silicon tetrachloride and the boron trichloride or carbon tetrachloride being present in an amount about stoichiometrically equivalent to the boride ...

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

    This paper describes the effect of temperature on the hardness of a number of carbides and borides. The specimens were usually sintered and self-bonded but some experiments were also made on single crystals of titanium carbide. SPECIMENS Table I shows some of the physical properties of the polycrystalline refractory com- pounds that were studied.

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  • Ultra-High Temperature Materials II - Refractory

    Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) Provides exhaustive coverage for numerous alloys, ceramics, carbides, nitrides, borides, oxides and dioxides. Please be advised Covid-19 shipping restrictions apply. Please review prior to ordering. This exhaustive work in three volumes and over 1300 pages provides a thorough treatment of ...

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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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  • 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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  • Materials Science of Carbides, Nitrides and Borides

    2017-8-23 · of Carbides, Nitrides and Borides held in St. Petersburg, Russia, August 12-22, 1998. A total of 98 scientists from 16 countries participated in our ASI, making it a really international event. Participants ranged from graduate ... field of materials science of refractory materials…

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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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  • Overview of Refractory Materials - PDHonline.com

    2012-5-29 · and zirconium and some non-oxide refractories like carbides, nitrides, borides, silicates and graphite. The main types include fire-clay bricks, castables, ceramic fiber and insulating bricks that are ... refractory materials such as magnesia, which has a melting point of 5070 degrees. Requirements of Right Refractory

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  • Lanthanides: Boride, Carbide, and Nitride Compounds

    2012-12-17 · The rare earth borides, carbides, and nitrides tend to be highly refractory compounds, typically with melting points above 2300 K. One way of looking at the less metal-rich compounds is that the boron, carbon, and nitrogen atoms, respectively, form strongly covalent atomic networks in which rare earth atoms occupy particular spaces/voids.

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  • Refractory materials | Metallurgy for Dummies

    2021-1-19 · The bulk of refractory materials consist of single or mixed high melting point oxides of elements such as silicon, aluminium, magnesium, calcium and zirconium. Non-oxide refractories also exist and include materials such as carbides, nitrides, borides and graphite. The actual composition of a refractory material is dependent on operating ...

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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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  • Materials Science of Carbides, Nitrides and Borides |

    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. Topics include structure and electronic properties, modeling, processing, high-temperature

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  • Electrical properties of high-temperature oxides,

    High-temperature materials including oxides, borides, carbides, and nitrides encompass all types of conductors: metallic, semiconducting, and ionic. Their electrical conductivities are generally very sensitive to impurities regardless of the type of conductor. For large band-gap materials, which includes most of the oxides, the conductivities at low temperatures are frequently dominated by ...

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  • Novel Polymer-Derived Carbide and Boride Refractory ...

    2015-12-11 · Ceramics such as refractory metal carbides and borides (e.g., ZrC, HfC, TaC, ZrB2, HfB2, etc.) are candidate materials for these applications because of their high thermal conductivity and the high melting temperatures of both the base material and the solid oxidation product.

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  • Overview of Refractory Materials - PDHonline.com

    2012-5-29 · and zirconium and some non-oxide refractories like carbides, nitrides, borides, silicates and graphite. The main types include fire-clay bricks, castables, ceramic fiber and insulating bricks that are ... refractory materials such as magnesia, which has a melting point of 5070 degrees. Requirements of Right Refractory

    Get Price
  • Lanthanides: Boride, Carbide, and Nitride Compounds

    2012-12-17 · The rare earth borides, carbides, and nitrides tend to be highly refractory compounds, typically with melting points above 2300 K. One way of looking at the less metal-rich compounds is that the boron, carbon, and nitrogen atoms, respectively, form strongly covalent atomic networks in which rare earth atoms occupy particular spaces/voids.

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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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  • 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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  • 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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  • Materials — Plus Designs, Inc.

    Refractory materials are generally classified as non-metals, metals, ceramics, and alloys thereof that melt or otherwise change from a solid form at temperatures above 3000°F. There are a variety of technical challenges associated with high temperature material design including their thermal-structural and thermal-chemical response during ...

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  • THE ANALYSIS OF REFRACTORY BORIDES, CARBIDES,

    THE ANALYSIS OF REFRACTORY BORIDES, CARBIDES, NITRIDES ...

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  • The Physics and Chemistry of Carbides, Nitrides and

    Carbides, nitrides and borides are families of related refractory materials. Traditionally they have been employed in applications associated with engineering ceramics where either high temperature strength or stability is of primary importance. In recent years there has been a growing awareness of the interesting electrical, thermal and optical properties exhibited by these materials, and the ...

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  • Borides Meaning | Best 1 Definitions of Borides

    What does borides mean? Plural form of boride. (noun) Dictionary Menu. ... on the fusion and volatilization of refractory materials, and on the formation of carbides, suicides and borides of various metals, consisted, ... and the most refractory elements are converted into vapour, ...

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  • Borides & Carbides - qkmaterials.com

    Borides & Carbides. A boride is a compound consisting of boron and a less electronegative element such as silicon boride. The borides of transition and rare-earth metals are considered for application as wear-resistant and corrosion-resistant, decorative or thermionic coatings.

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  • SHS of Refractory Carbides, Borides, Related Solid ...

    Since the inception of self-propagating high-temperature synthesis (SHS), the production of refractory carbides and borides was one of the main areas of SHS application. SHS provides unique reaction conditions, including extremely high reaction temperature and rapid heating/cooling, and produces materials with novel microstructures and ...

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  • -1- THSBMAL DECOMPOSITION OF REFRACTORY BORIDES

    2018-6-29 · REFRACTORY BORIDES by Ian Gregory VORSLEY A thesis presented for the degree of ... With the increasingly stringent specifications for materials of technological importance, interest has grown ... nitrides, carbides, borides, silicides and phosphides. Some important compounds of titanium, zirconium and hafnium are listed below.

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  • Combustion joining of refractory materials:

    2009-8-31 · Refractory materials such as carbon possess properties that make joining them difficult. ... specifications. The combustion-joining (CJ) method, which will be described further, is an attractive approach ... 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 ...

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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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  • FORMATION AND REACTIVITY OF SOME METAL

    Refractory Bprides .composed of B fit Ti Carbides bonded with Metals. Presented at 99th meeting Electrochem.Soc., VJash,

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  • 'The use of carbides in refractories' by James

    'With the new demands being made on the ceramic industry in mind, it was thought that an investigation of the ceramic possibilities of certain high melting refractory materials might prove of interest and value. The high melting materials are the oxides, carbides, nitrides, borides, and hydrides. Since a great deal of work has been done on the oxides, and relatively little on the others, the ...

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  • 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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  • Handbook Of Refractory Carbides Nitrides Properties ...

    2021-6-8 · materials due to their high strength, tendency Bing: Handbook Of Refractory Carbides Nitrides A refractory material or refractory is a material that is resistant to decomposition by heat, pressure, or chemical attack, and retains strength and form at high temperatures. Refractories are polycrystalline, polyphase, inorganic, non-metallic,

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  • NATO Science Partnership Subseries: 3: Materials

    2020-9-27 · Free 2-day shipping. Buy NATO Science Partnership Subseries: 3: Materials Science of Carbides, Nitrides and Borides (Hardcover) at Walmart.com

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  • SHS of Refractory Carbides, Borides, Related Solid ...

    Since the inception of self-propagating high-temperature synthesis (SHS), the production of refractory carbides and borides was one of the main areas of SHS application. SHS provides unique reaction conditions, including extremely high reaction temperature and rapid heating/cooling, and produces materials with novel microstructures and ...

    Get Price
  • Combustion joining of refractory materials:

    2009-8-31 · Refractory materials such as carbon possess properties that make joining them difficult. ... specifications. The combustion-joining (CJ) method, which will be described further, is an attractive approach ... 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 ...

    Get Price
  • FORMATION AND REACTIVITY OF SOME METAL

    Refractory Bprides .composed of B fit Ti Carbides bonded with Metals. Presented at 99th meeting Electrochem.Soc., VJash,

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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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  • 'The use of carbides in refractories' by James

    'With the new demands being made on the ceramic industry in mind, it was thought that an investigation of the ceramic possibilities of certain high melting refractory materials might prove of interest and value. The high melting materials are the oxides, carbides, nitrides, borides, and hydrides. Since a great deal of work has been done on the oxides, and relatively little on the others, the ...

    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
  • Handbook Of Refractory Carbides Nitrides Properties ...

    2021-6-8 · materials due to their high strength, tendency Bing: Handbook Of Refractory Carbides Nitrides A refractory material or refractory is a material that is resistant to decomposition by heat, pressure, or chemical attack, and retains strength and form at high temperatures. Refractories are polycrystalline, polyphase, inorganic, non-metallic,

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  • Materials Science: Tutorials: Ceramics

    2021-6-17 · Herein, we critically evaluate computational and experimental studies in the emerging field of high-entropy ultra-high-temperature ceramics. High-entropy ultra-high-temperature ceramics are candidates for use in extreme environments that include temperatures over 2,000°C, heat fluxes of hundreds of watts per square centimeter, or irradiation from neutrons with energies of several …

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  • High-Entropy Ultra-High-Temperature Borides and

    Ultra-High Temperature Materials II: Refractory Carbides I (Ta, Hf, Nb and Zr Carbides) 1st ed. 2019 Edition by Igor L. Shabalin (Author) ISBN-13: 978-9402413007

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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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  • Borides & Carbides - qkmaterials.com

    Borides & Carbides. QUKEN provides a standard range of borides and carbides evaporation materials optimized for the special requirements of physical vapor deposition (PVD). These materials come as various geometric shapes - Foils, Granules, Pellets, Rods, and Sheets, etc. Please find our materials …

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  • Materials Science: Tutorials: Ceramics

    Materials Science of Carbides, Nitrides and Borides by unknown from Flipkart.com. Only Genuine Products. 30 Day Replacement Guarantee. Free Shipping. Cash On Delivery!

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  • Materials Science of Carbides, Nitrides and Borides:

    Carbides, nitrides and borides are families of related refractory materials. Traditionally they have been employed in applications associated with engineering ceramics where either high temperature strength or stability is of primary importance. In recent years there has been a growing awareness of the interesting electrical, thermal and ...

    Get Price
  • Amazon.com: The Physics and Chemistry of Carbides ...

    2021-5-26 · applications are recent, the refractory carbides and nitrides have been known for over one hundred years. The industrial importance of the refractory carbides and nitrides is growing rapidly, not only in the traditional and well-established applications based on the strength and refractory nature of these materials such as cutting tools and ...

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  • Handbook Of Refractory Carbides Nitrides Properties ...

    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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  • Synthesis of polymeric precursors for refractory

    Abstract: Work during 1963 is reported and the work from mid-1960 reviewed on a comprehensive program of thermodynamic and kinetic studies necessary to the theoretical consideration to tempreatures of 30000K of the reactions of the zirconium and hafnium carbides and borides with oxygen- or halogen-containing atmospheres.

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  • Thermodynamic and Kinetic Studies for a Refractory ...

    MAX and MAB phases are thermodynamically stable nanolaminates of early transition metals carbides, nitrides, and borides. For example, MAX phases are hexagonal materials with an inherent layering at nanoscale. This structure is responsible for a unique combination of metal and ceramic-like properties. Some of them are machinability, good electrical and thermal conductivity, high thermal shock ...

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  • S12: On the Design of Nano-laminated Ternary

    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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  • 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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  • Combustion joining of refractory materials:

    A few studies involving C–C composites specifically have used various layer compositions including refractory borides (TiB 2 and ZrB 2), Reference Dadras, Ngai and Mehrota 7 carbides (SiC, B 4 C, and WC), Reference Dadras and Mehrotra 6, Reference Dadras, Ngai and Mehrota 7, Reference Xue and Narasimhan 8, Reference Xue and Narasimhan 9 or ...

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  • Ultra-high temperature materials I: Carbon (graphene ...

    The first volume focuses on carbon (graphite/graphene) and refractory metals (W, Re, Os, Ta, Mo, Nb, Ir). The second and third volumes are dedicated solely to refractory (ceramic) compounds (oxides, nitrides, carbides, borides, silicides) and to the complex materials - refractory alloys, carbon and ceramic composites, respectively.

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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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  • Chemical classes of the SHS processes and materials

    2017-7-24 · of different classes. To date, practically all known refractory inorganic materials such as carbides, borides, nitrides, silicides, chalcogenides, and others have been prodused by SHS. Usually, the final products of synthesis are higher compounds, which frequently show better

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  • UNCLASSIFIED AD 29' 351

    PRODUCTION OF REFRACTORY CARBIDES. BORIDES AND THE LIKE. U. S. Patent no. 3,019,084. 30 January 1962. Titanium and zirconium borides and carbides of low free carbon content may be produced continuously by preparing a solid reaction mass of mixed metal oxides with carbon or boron and carbon, continuously introducing the mass into a reaction

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  • Synthesis of Polymeric Precursors for Refractory

    Synthesis of Polymeric Precursors for Refractory Carbides and Borides Thesis Link to document; Overview; Other; Overview abstract . Thesis (M.S., Chemical and Materials Science Engineering) -- University of Idaho, 2015 | Hafnium Carbide and diboride are ceramics with ultra-high melting temperatures representing the upper end of refractory materials.

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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. Friction testing was done with a pin-on …

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  • S12: On the Design of Nanolaminated Ternary

    The MAX and MAB phases are thermodynamically stable nanolaminates of early transition metals carbides, nitrides, and borides. The MAX/MAB phases are hexagonal materials with an inherent nanolayered crystal structure that is responsible for an unusual and unique combination of metal-like and ceramic-like properties, such as machinability, good electrical/thermal conductivity, high thermal shock ...

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  • International Journal of Refractory Metals and Hard

    2021-3-28 · CiteScore: 2019: 5.5 CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g. 2016-2019) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of these documents …

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