1975 Volume 12 Issue 2 Pages 115-119
The formation of PuC1-x and Pu2C3 by heating a powdered mixture of PuO2 and graphite was studied in the temperature range of 1, 000°1, 350°C under reduced pres-sure. The reactions were pursued thermogravimetry, X-ray and chemical analyses.
The reaction rates for the formation of PuC1-x and Pu2C3 obey the surface reaction law, the apparent activation energies of carburization being 102 and 105 kcal/mol, respectively. In the reaction between PuO2 and graphite, Pu2C3 is formed directly, and PuC1-x is formed in turn therefrom. When the carbides are heated continuously above 1, 450°C, appreciable weight loss takes place, which could be attributed to evaporation of Pu from the carbides.
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