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Abstract

The self-diffusion of 238-Pu was measured in an oxycarbide (U,Pu)(C,O) and a carbonitride (U,Pu)(C,N). The activation enthalpies were 447 and 347 kj.mol**-1, respectively. The carbonitrides were confirmed to fall into three classes: carbide-like compositions with less than 30 % nitrogen in the metalloid lattice, mitride-like composition with more than 70 % nitrogen and with reduced atomic mobilities, and carbonitrides with +- 50 % nitrogen showing an intermediate behavior. The oxycarbide showed diffusion coefficients slightly larger than those of pure carbides.

Additional information

Authors: BRADBURY M H AERE HARWELL (UK) MATZKE HJ JRC KARLSRUHE ESTAB. (GERMANY) , AERE HARWELL (UK);JRC KARLSRUHE ESTAB. (GERMANY)
Bibliographic Reference: NUCLEAR SCIENCE & ENGINEERING, VOL. 84 (1983), PP. 291-293
Record Number: 1989122030200 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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