|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Late News Poster Session
||O-17: Ceramic Crucibles for Nuclear Materials Pyroprocessing
||Thomas Dalger, Ludovic Deliere, Sophie Le Gallet
|On-Site Speaker (Planned)
Ceramic crucibles are widely used in pyrochemical processing; it offers good chemical and thermal resistance under severe conditions. However, chlorine salts can corrode ceramic materials, leading to brittleness or impregnation of the crucible by the salt. When pyroprocessing nuclear materials, the latter can result as contamination of the crucible. A study was carried out to understand the phenomenon of ceramics impregnation by molten salts. Ceramic samples were contacted with salts and the surface state of the samples was characterized afterwards. It showed a preferential dissolution route through grain boundaries, and thus the formation of a pathway for the salt to penetrate. Chemical analysis performed on the salt revealed the presence of elements composing the ceramic in the salts. In parallel, an innovative route to prepare ceramic materials is studied, involving 3D printing. It allows the manufacturing of ceramic pieces with complex geometry, which are difficult to make with conventional methods.
||Nuclear Materials, Pyrometallurgy, Ceramics