Results 231 to 240 of about 11,543 (271)
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Elastic moduli of niobium carbide and tantalum carbide at high temperature
Journal of the Less Common Metals, 1971Abstract The Young's, shear and bulk moduli of polycrystalline NbC 0.95 and TaC 0.99 were determined from room temperature to 1500°K by the sonic resonance technique. The Young's and shear moduli decrease linearly with increasing porosity, and also decrease with increasing temperature, in agreement with the Wachtman's empirical equation.
C.K. Jun, P.T.B. Shaffer
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Pressureless sintering of single-phase tantalum carbide and niobium carbide
Journal of the European Ceramic Society, 2013Abstract This work presents the results of studies on the preparation of single-phase polycrystalline tantalum carbide and niobium carbide. It has been found that it is possible to obtain polycrystals with high density in the pressureless sintering process at temperatures up to 2000 °C and therefore relatively low temperatures such as for the ...
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Structure and properties of tantalum carbide crystals
Journal of Materials Science, 1970Single crystals of tantalum carbide, up to 2 mm in size have been grown from solution in a bath of molten iron. The slip plane was found to be {111} using a two-surface analysis on etch-pitted crystals deformed by microindentation at room temperature.
D. J. Rowcliffe, W. J. Warren
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Coatings made of tungsten carbide and tantalum carbide for machining tools
Vacuum, 2010Continuous evolution of cutting parameters has been a constant requirement for the manufacture of machining tools. This has promoted the development of new technologies to reduce the production time as well as cost without affecting the competitiveness.
F.E. Palomar +5 more
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Phase evolution of tantalum nitride and tantalum carbide films with PBII parameters
Rare Metals, 2011Tantalum nitride and tantalum carbide films were fabricated using magnetron sputtering of tantalum followed by nitrogen and carbon plasma-based ion implantation (N-PBII and C-PBII). The phase evolution and morphology of the films were studied using glancing angle X-ray diffraction (GXRD) and transmission electron microscopy (TEM). It was found that the
Zhongwen Li +5 more
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Preparation and Some Properties of Tantalum Carbide
Journal of Applied Physics, 1962Small tantalum carbide objects may be made by heating the objects made from tantalum in dilute hydrocarbon atmospheres at temperatures >2000°K. Carburization proceeds quite rapidly above 2300°K by diffusion of carbon initially deposited on the surface into the metal, principally along grain boundaries, to form a thin layer of Ta2C which is ...
Bernard H. Eckstein, Ralph Forman
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High-Temperature Heat Content of Niobium Carbide and of Tantalum Carbide
The Journal of Chemical Physics, 1963The heat content of niobium carbide was measured between 1289° and 2778°K and that of tantalum carbide between 1296° and 2843°K using a drop calorimeter.
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Development of a Selective Tantalum Carbide Etchant
ECS Transactions, 2006A superior nonflammable selective TaC etchant has been developed. This etchant possesses a TaC etch rate of 13 Aå/minute as well as TaC to HfO2 etch selectivity of 140:1. The TaC to SiO2 etch selectivity is high enough to allow the use of this etchant with a SiO2 hard mask.
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Electron beam deposited tantalum carbide film on titanium
2006Tantalum carbide (TaC) thin films were electron beam deposited on a roughened surface of pure titanium using a hot-pressed TaC ceramic target. The as-deposited film retained the stoichiometry of the TaC target, but after exposure to 750°C in vacuum the TaC film transformed to Ta2C and developed cracks.
LATINI, ALESSANDRO +4 more
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Research progress on tantalum carbide coatings oncarbon materials
New Carbon Materials, 2021Xing-liang LIU +3 more
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