【作者】 肖红星； 龙冲生；

【Author】 XIAO Hong-xing;LONG Chong-sheng;Science and Technology on Reactor Fuel and Materials Laboratory of Nuclear Power Institute of China;

【机构】 中国核动力研究设计院反应堆燃料及材料重点实验室；

【摘要】 反应堆控制棒材料Ag-In-Cd合金在堆内辐照过程中会发生嬗变产生Sn,从而使Ag-In-Cd三元合金转变为Ag-In-Cd-Sn四元合金。因此,研究不同Sn含量Ag-In-Cd-Sn合金的微观结构及热物理性能对于深入认识Ag-In-Cd合金材料在堆内的辐照行为具有重要意义。采用光学显微镜和扫描电镜研究了不同Sn含量Ag-In-Cd-Sn合金的微观结构。采用激光脉冲法分别测量了不同Sn含量Ag-In-Cd-Sn合金的热扩散率和热导率等热物理性能。结果显示,由于Sn的加入,Ag-In-Cd-Sn四元合金会由原来Ag-In-Cd三元合金的单相结构转变为两相结构。Ag-In-Cd-Sn合金的热扩散率和热导率在相同温度条件下均随着Sn含量的增加而下降,在同种Sn含量条件下均随着温度的升高而升高。更多还原

【Abstract】 The Ag-In-Cd ternary alloy will transfer to Ag-In-Cd-Sn quaternary alloy under neutron irradiation in nuclear reactor due to the transmutation reactions inside the Ag-In-Cd ternary alloy.It is very important for recognizing the irradiation behavior of Ag-In-Cd alloy by research on the microstructures and thermo-physics properties of the Ag-In-Cd-Sn alloys with the different Sn content.The microstructures of Ag-In-Cd-Sn alloys with the different Sn content have been investigated by optical microscope(OM) and scanning electron microscope(SEM).The thermal diffusivity and conductivity have been measured by laser bombard method in this work.The results showed that the transformation induce chemical modifications inside the single phase alloy and,further,formation of two phases.The thermal diffusivity and conductivity of Ag-In-Cd-Sn alloy decreased as the Sn content increased under the uniform temperature but increased as the temperature increased under the uniform Sn content.更多还原