KINETICS OF GRAPHITE-URANIUM DIOXIDE REACTION FROM 1400 DEGREES-C TO 1756 DEGREES-C

被引：33

作者：

LINDEMER, TB

ALLEN, MD

LEITNAKE.JM

机构：

[1] Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1969年 / 52卷 / 05期

关键词：

D O I：

10.1111/j.1151-2916.1969.tb09173.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The reaction of microspheres of UOz with graphite was studied from 1400° to 1756°C. When a spherically symmetrical layer of carbide was produced around the UO2 core, only UC2 was formed, and the diffusion of oxygen through this layer was rate‐controlling. The Arrhenius relation for this system is kD= 21.0 exp(−90, 000/RT) cm2/s The reaction of a geometrically nonsymmetrical configuration of UO2 and UC2 was also studied. Comparison of the reactions in the symmetrical and nonsymmetrical systems demonstrated that the kinetic behavior of the two systems is quite different and that the conversion in the nonsymmetrical system was 2 to 5 times faster. The importance of these observations to kinetic results reported in the literature for analogous systems is discussed. Copyright © 1969, Wiley Blackwell. All rights reserved

引用

页码：233 / &

共 19 条

[1]

AINSLEY R, 1963, P C NEW NUCLEAR MATE, V1, P349

[2] X-RAY THERMAL EXPANSION OF NEAR-STOICHIOMETRIC UO2 [J].