铀及铀合金熔体与石墨坩埚涂层反应的热力学分析  

Thermodynamic Analysis for the Reaction of Liquid Uranium and Its Alloys with Coatings of Graphite Crucibles

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,陕西西安710072

出　　处：《稀有金属材料与工程》2003年第3期187-190,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(10076013)

摘　　要：利用热力学计算,分析了一些材料在高温下与金属铀及铀合金反应的可能性,得到了这些反应ΔG°与温度的关系图。通过比较和分析这些材料对铀及铀合金熔体在高温下的化学稳定性,发现氧化钇对金属铀和铀合金熔体的化学稳定性最好,为熔铸金属铀和铀合金的石墨坩埚理想涂层材料。Thermodynamic calculation has been used to analyze the possibility of the reactions of some materials with liquid uranium and its alloys at high temperature. The interrelated graphs of DeltaGdegrees to temperature for those reactions have been obtained by thermodynamic calculation. The chemical stability to liquid uranium and its alloys for those materials has been analyzed and compared. It was found that yttria 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：铀 铀合金 石墨坩埚 涂层 热力学 熔模铸造 

分 类 号：TG174.4[金属学及工艺—金属表面处理]