KINETICS OF INTERFACIAL REACTIONS IN MOLTEN U SOLID Y2O3 SYSTEM

Authors
TOURNIER C LORRAIN B LEGUYADEC F COUDURIER L EUSTATHOPOULOS N
Citation
C. Tournier et al., KINETICS OF INTERFACIAL REACTIONS IN MOLTEN U SOLID Y2O3 SYSTEM, Journal of nuclear materials, 254(2-3), 1998, pp. 215-220
Citations number
16
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
Journal title
Journal of nuclear materials → ACNP
ISSN journal
00223115
Volume
254
Issue
2-3
Year of publication
1998
Pages
215 - 220
Database
ISI
SICI code
0022-3115(1998)254:2-3<215:KOIRIM>2.0.ZU;2-F
Abstract
The reactivity between liquid uranium and polycrystalline yttria subst rates of various grain-sizes is studied at 1673 K under high vacuum-lo w p(O2) conditions (p(O2) approximate to 10(-7) Pa). At short contact times, uranium oxidation occurs at the metal/oxide interface from oxyg en transferred from the yttria substrate which is transformed to an un der-stoichiometric state. At long contact times, deoxidation occurring at the uranium free surface predominates and leads to complete elimin ation of oxidized uranium by a dissolution-evaporation mechanism. (C) 1998 Elsevier Science B.V.