摘要
本项工作采用92土0．3at％如B富集度的碳化硼粉末，经过热压烧结工艺制得了快堆控制棒组件用碳化硼芯块样品，并研究了热压烧结碳化硼芯块的热物理性能。结果表明：利用1900℃下保温10min的热压烧结工艺，碳化硼芯块的相对密度在87．3％～89．6％TD范围内；碳化硼芯块在室温～1000℃内，随着温度升高，热导率降低，热膨胀系数增大，该数据为我国快堆控制棒组件设计提供了重要依据。
Hot--pressed boron carbide （B4C） pellets were prepared using fine B4C powders with 92＋ 0.3at% 10B enrichment. The thermophysical properties of B4C pellets were studied. The results show that the relative densities of B4C pellets sintered at 1900℃ for 10 min are in the range of 87.3%-89.6%TD. Within 1000℃, as temperature increases, the thermal conductivity of B4C pellet decrea- ses, but the linear expansion coefficient increases. These data provide the important input for the con- trol rod subassembly design of fast reactor in China.
出处
《山东陶瓷》
CAS
2015年第4期3-5,共3页
Shandong Ceramics
关键词
富集度
碳化硼
热导率
热膨胀系数
Enrichment
Boron Carbide
Thermal Conductivity
Linear Expansion Coefficient
