铀及铀合金与熔炼坩埚涂层材料高温反应的热力学分析  

Analysis for the Reaction of Liquid Uranium and Its Alloy With the Coating Material

作　　者：张显[1] 成来飞[1] 张立同[1] 徐永东[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《原子能科学技术》2003年第z1期131-134,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金(10076013)

摘　　要：通过热力学计算,分析了熔炼坩埚的涂层材料与铀及铀合金高温反应的可能性,得到了反应自由能△G^0与温度间的关系曲线,比较分析了涂层材料对铀及铀合金熔体在高温下的化学稳定性。结果表明:氧化钇对铀和铀合金熔体的化学稳定性最佳,是熔铸铀和铀合金石墨坩埚的理想涂层材料。The thermodynamic analysis is carried out for the reaction of liquid uranium and its alloy with some coating materials at high temperature and the curves of △G0 of those reactions with temperature are obtained. The chemical stability of those coating materials to liquid uranium and its alloys is analyzed and compared. It is found that yt-tria has a good stability to liquid uranium and its alloys at high temperature, and it is well suitable for coating of graphite crucible for melting uranium and its alloys.

关 键 词：金属铀 铀合金 石墨坩埚 涂层 热力学 

分 类 号：TL146.8[核科学技术—核能科学]