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3 edition of Heats of Formation of Zirconium Carbide and Hafnium Carbide. found in the catalog.

Heats of Formation of Zirconium Carbide and Hafnium Carbide.

United States. Bureau of Mines.

Heats of Formation of Zirconium Carbide and Hafnium Carbide.

by United States. Bureau of Mines.

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  • 21 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 6518
ContributionsMah, A.
ID Numbers
Open LibraryOL21741222M

Zirconium, Hafnium and Niobium 1. Occurrence, extraction and metallurgy Physical and Chemical Properties and applications Compounds of these metals, alloys and the uses: ZIRCONIUM, HAFNIUM AND NIOBIUM 2. ZIRCONIUM A] OCCURRENCE: • Does   Elevated temperature mechanical properties of zirconium diboride based ceramics Zirconium Diboride-Zirconium Carbide Ceramic” will be submitted to the. Journal formation of B-O-C-N phases that bridged SiC clusters above °C. For ZC,?article=&context=doctoral.

Preferential extraction of zirconium and hafnium thiocyanates preparation of pure hafnium / (Oak Ridge, Tennessee: United States Atomic Energy Commission, Technical Information Service, ), by C. J. Barton, W. R. Grimes, L. G. Overholser, Carbide and Carbon Chemicals Corporation, U.S. Atomic Energy Commission, and Oak Ridge Y Plant (page ?type=lcsubc&key=Zirconium&c=x.   That book was an excellent. guide on experimental procedures used in thermochemistry. The tables avaiiable in the book represent the heats of combustion and formation of many organic compounds. The results obtained in the laboratory made it possible to establish some simplest thermochemical relationships. 50, in the short course

Zirconium carbide (ZrC) is a much-promising material, it has received increased interest recently as an alternative material to silicon carbide (SiC) in nuclear fuel applications 1,2, in next Sintering of niobium carbide has been reported in four works: Wodyt et al in , 29 Sautereau et al in , 26 and Ordan'yan et al in and 24, 25 However, this is the first detailed study of elemental ejections from sintering, elemental analysis, and calibrated X‐ray ://@/(ISSN)


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Heats of Formation of Zirconium Carbide and Hafnium Carbide by United States. Bureau of Mines. Download PDF EPUB FB2

Additional Physical Format: Online version: Mah, Alla D. Heats of formation of zirconium carbide and hafnium carbide.

[Washington: U.S. Bureau of Mines, ] 2. Synthesis Methods. Zirconium and hafnium carbides and nitrides can be synthesized by direct reaction of metal or metal hydride powders with graphite or N reactions are strongly exothermic and can be used in a self-propagated high temperature synthesis (SHS) process [].The reaction of oxides with graphite (carbothermal process) is widely used for industrial synthesis of bulk carbide Heats of formation of zirconium carbide and hafnium carbide / By Alla D.

Mah. Abstract. Includes bibliographic of access: Internet The same group reported new measurements on the formation enthalpy of hafnium carbide in The value of the formation enthalpy of ZrN included in a Glushko’s reference book ( ± kJ/mol is consistent with the latest measurements performed by Galbraikh et al.

[ 92 ] for stoichiometry ranging from ZrN to ://   The Zirconium-Hydrogen System: Some Thermodynamic Properties from a Heat Content Study1. Journal of the American Chemical Society80 (19), DOI: /jaa Bradford C.

Schulz, Daniel Butts, Gregory B. Thompson. Oxidation behavior of vacuum plasma-sprayed hafnium–tantalum :// same group reported new measurements on the formation enthalpy of hafnium carbide in [].

Table 2. Selected thermodynamic properties for rocksalt ca rbides and nitrides of Ti, Zr, and Hf   Heats of Formation of Niobium Nitride, Tantalum Nitride and Zirconium Nitride from Combustion Calorimetry Alla D.

Mah, Norma L. Gellert J. Chem. Soc., An in situ polymerizable complex method to produce zirconium carbide, hafnium carbide and their ternary carbides at a relatively low temperature ( °C) using simple and mainly nontoxic starting reagents is presented.

In this aqueous process, citric acid (CA) was used to chelate the metal ion and ethylene glycol (EG) to form a polymerized complex :// Applications of refractory carbides and nitrides are found extensively in machinery and equipment for protection against wear, erosion, and chemical attack.

Both bulk materials and coatings are used. The most important bulk material is tungsten carbide sintered with a metallic binder that is usually :// /handbook-of-refractory-carbides-and-nitrides.

Within the scale, hafnium oxynitride phases were observed. A transformation pathway in forming these rhombohedral oxynitride phases is proposed by the filling in of oxygen in the light element interstitial locations of the rhombohedral ε-Hf 3 N 2 and ζ-Hf 4 N 3 ://   Purchase Handbook of Refractory Carbides and Nitrides - 1st Edition.

Print Book & E-Book. ISBN  @article{osti_, title = {Reactively sputtered nitrides and carbides of titanium, zirconium, and hafnium}, author = {Sproul, W D}, abstractNote = {TiN, TiC, ZrN, ZrC, HfN, and HfC coatings were reactively sputtered at high rates of A/min onto T high speed steel cutting tool inserts.

Nitrogen was controlled through closed loop peak feedback control for the preparation of Among transition metal carbides and nitrides, zirconium, and hafnium compounds are the most stable and have the highest melting temperatures.

Here we review published data on phases and phase equilibria in Hf-Zr-C-N-O system, from experiment and ab initio computations with focus on rocksalt Zr and Hf carbides and nitrides, their solid solutions and oxygen solubility :// The Online Books Page.

Online Books by. Alla D. Mah. Mah, Alla D.: Thermodynamic Properties of Aluminum Nitride (report of investigations ; Washington: U.S. Dept. of the Interior, Bureau of Mines, ), also by E. King, W. Weller, and A. Christensen (page images at HathiTrust) Help with reading books-- Report a bad link-- Suggest a new ?key=Mah, Alla D.

Zirconium is a chemical element with the symbol Zr and atomic number The name zirconium is taken from the name of the mineral zircon, the most important source of zirconium. It is a lustrous, grey-white, strong transition metal that closely resembles hafnium and, to a lesser extent, titanium.

Zirconium is mainly used as a refractory and opacifier, although small amounts are used as Solid solutions of Tantalum carbide (TaC) and Hafnium carbide (HfC) were synthesized by spark plasma sintering.

Five different compositions (pure HfC, HfC vol.% TaC, HfC- 50 vol.% TaC, HfC- 80   ∆fH° Standard molar enthalpy (heat) of formation at K in kJ/mol ∆fG° Standard molar Gibbs energy of formation at K in kJ/mol S° Standard molar entropy at K in J/mol K Cp Molar heat capacity at constant pressure at K in J/mol K ~jolkkonen/pdf/   Mah AD () Heats of formation of zirconium carbide and hafnium carbide.

Report BM-RI US Bureau of Mines, US Department of the Interior, Washington, DC, pp. 1–8 Google Scholar Manufacturing of the single-phase binary carbide (Ta,Hf)C by self-propagating high-temperature synthesis (SHS) from a mechanically activated (MA) reaction mixture is discussed.

The effect of mechanical activation conditions on the microstructure and phase composition of the reaction mixtures and the SHS products was ://   Carbides are compounds in which the anion is one or more carbon atoms.

Most metals form carbide compounds, though not all--indium and gallium, for example, do not. American Elements' manufacturing emphasizes production of metallic carbide materials including boron carbide, cobalt carbide, chromium carbide, hafnium carbide, molybdenum carbide, niobium carbide, tantalum carbide, titanium carbide.

From to Torr of CO/sub 2/ HfC had the next lowest linear corrosion rate, The formation and accumulation of nonvolatile oxide coatings on zirconium and hafnium carbides and borides decreased their corrosion ratesmore»  Tantalum carbide is widely used as sintering additive in ultra-high temperature ceramics (UHTCs) or as a ceramic reinforcement in high-entropy alloys (HEAs) due to its excellent physical properties in melting point, hardness, elastic modulus, thermal conductivity, thermal shock resistance, and chemical stability, which makes it a desirable   Mah AD, Boyle BG () Heats of formation of niobium carbide and zirconium carbide from combustion calorimetry.

J Am Chem Soc 77(24)– Google Scholar