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