Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1477 - C7-1480
DOI http://dx.doi.org/10.1051/jp4:19937231
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1477-C7-1480

DOI: 10.1051/jp4:19937231

Grain growth and Ostwald ripening in chromia-doped uranium dioxide

V. PERES, L. BOURGEOIS and P. DEHAUDT

CEA/CENG DRN/DTP/SECC/LRMC, BP. 85 X, 38041 Grenoble cedex, France


Abstract
The use of solid solution additives such as "corundum" types oxides is a practical mean for enhancing grain growth of stoichiometric uranium dioxide. The present paper deals with chromia-doped UO2 samples. Large-grain sized fuels can be produce by addition of less than 1000 ppm of chromia to UO2 powder prior to sintering. Above the solubility limit, excess of insoluble Cr2O3 precipitates from solid solution to create second phase inclusions in UO2 matrix. These inclusions coalesce by an Ostwald ripening phenomenon.



© EDP Sciences 1993