Topic
Carbide
About: Carbide is a research topic. Over the lifetime, 36331 publications have been published within this topic receiving 503586 citations.
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TL;DR: In this article, a model was proposed for the active catalytic surface of the alumina-supported Mo carbide and nitride catalysts in which a thin layer of highly dispersed sulfided Mo was present on the surfaces of the catalysts.
180 citations
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TL;DR: In this article, it was shown that the mononitrides of zirconium, columbium, titanium, and vanadium are also soluble in each other, with the exception of the pair.
Abstract: Previous investigators have shown that the binary systems involving the monocarbides of zirconium, columbium, tantalum, titanium, and vanadium are of the solid solution type, with the exception of which are almost completely insoluble in each other. In the present study it is shown that the mononitrides of zirconium, columbium, titanium, and vanadium, which have the same type crystal structure as the corresponding carbides, are also soluble in each other, with the exception of the pair . As in the case of the carbides, this exception can be explained on the basis of the atomic size rule governing the formation of solid solution. Furthermore, it is established that most of the binary systems formed by a carbide and a nitride are of the solid solution type, providing the atomic diameters of the metal atoms do not differ by more than about 15 per cent. The systems involving zirconium carbide with the nitrides were not investigated because zirconium carbide decomposed in a nitrogen atmosphere at high temperature.
180 citations
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TL;DR: In this paper, an interface design strategy by matrix-alloying with Ti for in-situ interfacial carbide formation in reduced graphene oxide (RGO)/CuTi composites was reported.
180 citations
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TL;DR: In this paper, a thermodynamic model for the (U, Pu)O 2 oxide, the carbide fuels using the Calphad method to describe consistently both phase diagrams and thermodynamic data of the phases involved in the U-Pu-O-C system was derived.
180 citations
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TL;DR: In this article, the behavior of hafnium oxide was studied particularly in the temperature range 1500° to 18OO°C and its reactions with ZrO2, SiO2 and CaO were given in terms of lattice and other physical measurements, many of which were new.
Abstract: The behavior of hafnium oxide was studied particularly in the temperature range 1500° to 18OO°C. Properties of HfO2 at these temperatures and its reactions with ZrO2, SiO2, and CaO are given in terms of lattice and other physical measurements, many of which are new. Mono-clinic hafnium oxide is stable to 1700°C., which is 600° higher than the corresponding inversion temperature of zirconia. Otherwise HfO2 closely resembles ZrO2 (a) in its lattice dimensions and sintering behavior, (b) in forming a high-temperature tetragonal phase closely resembling tetragonal ZrO2, (c) in forming a continuous series of solid solutions with ZrOz, (d) in forming with silica a single compound (HfO2.SiO2) similar to zircon, (e) in forming a carbide, (f) in uniting with up to 40% CaO to form cubic solid solutions; thereafter a compound CaO.Hf O2 appears which is very similar to the corresponding zirconia compound.
180 citations