Kinetics of the Reaction of UC2 and Nitrogen from 1500o to 1700oC

Autor:	Terrence B. Lindemer, M. D. Allen, J. M. Leitnaker
Rok vydání:	1970
Předmět:	Materials science Diffusion Kinetics Inorganic chemistry chemistry.chemical_element Chemical reaction Nitrogen Chemical kinetics Reaction rate chemistry Materials Chemistry Ceramics and Composites Solid carbon Carbon
Zdroj:	Journal of the American Ceramic Society. 53:451-456
ISSN:	1551-2916 0002-7820
Popis:	The kinetics of the reaction of UC2 spheres with nitrogen was studied from 1500° to 1700°C. A metallographic method was used to determine the time-dependent conversion of UC2 to U(C,N) and free C. The conversion appeared to be controlled by the diffusion of solid carbon in solution to sites where it could precipitate as free carbon. These sites were the surface of the sphere and particles of free carbon that existed within the original UC2. An increased distribution of these internal sites decreased the distance for carbon diffusion and resulted in an increased rate of reaction. The UC2 appeared to undergo a very rapid initial reaction that resulted in the uptake of 1 to 5 at.% nitrogen in the UC2 at these temperatures.
Databáze:	OpenAIRE
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