铅铋合金热膨胀性能及室温时效研究  

Study on Thermal Expansion and Aging Performance of Lead-bismuth Eutectic

作　　者：徐敬尧[1,2] 王龙[2,3] 徐刚[2] 刘少军[2] 黄群英[2] FDS团队 

机构地区：[1]中国科学技术大学,安徽合肥230027 [2]中国科学院核能安全技术研究所,安徽合肥230031 [3]合肥工业大学,安徽合肥230009 [4]不详

出　　处：《核科学与工程》2014年第4期494-499,共6页Nuclear Science and Engineering

基　　金：中科院知识创新工程重要方向项目“ADS反应堆物理与技术”(编号:095CF2R211);中国科学院“未来先进核裂变能-ADS嬗变系统”先导专项子项目“铅铋材料与回路技术”(编号:XDA03040200)

摘　　要：铅铋共晶合金(LBE)热膨胀性能影响堆容器的安全性,LBE中杂质的存在会显著影响其热物性,需要制备高纯铅铋合金并对其热膨胀性能进行研究。本文制备出单个杂质元素含量低于10ppm且杂质元素总含量低于73ppm的高纯铅铋共晶合金。热膨胀性能研究结果显示LBE在液相-固相转变时体积增加了约0.80%,室温条件下固态LBE中β相向富铋γ相的转变是其宏观体积变化的最主要原因。Thermal expansion performance of lead-bismuth eutectic（LBE）influences the safety of reactor pressure vessel and the presence of impurities in LBE will make a significant impact on the thermo-physical properties.It is necessary to prepare high purity LBE and to study the thermal expansion performance of LBE.In this paper,the ingot of lead bismuth eutectic（LBE）was prepared.The test composition result showed that the contents of single impurity element and the total content of impurity elements were less than 10 ppm and 73 ppm,respectively.The results of thermal expansion performance experiments showed that the volume of LBE increased^0.80% during the liquid-solid phase transition and the main reason of macroscopic volumetric expansion of solid LBE at room temperature was the phase transition of LBE from β-phase toγ-phase.

关 键 词：铅铋共晶合金 热膨胀 真空感应熔炼 时效 

分 类 号：TL34[核科学技术—核技术及应用]