发明名称 NEUTRON ABSORBING MATERIAL
摘要 PROBLEM TO BE SOLVED: To provide a neutron absorbing material with improved thermal shock resistance that prevents easy reduction of the furnace life of a reactor control rod caused by the cracks in the neutron absorbing material due to thermal stress. SOLUTION: A neutron absorbing material is composed by a boron carbide/ silicon carbide fiber composite sintered body consisting of the boron carbide(B4C) containing silicon carbide(SiC) fiber whose surface is covered with boron nitride(BN) by 10-30 vol.%. A BN covering layer becomes a chemically stable phase at the interface between the SiC fiber and the boron carbide, the SiC fiber functions as a reinforcement material also against thermal stress under high temperature to prevent the sintering between both of them even in a sintering temperature region, and the crack of the composite sintered body can be effectively reduced.
申请公布号 JP2000155189(A) 申请公布日期 2000.06.06
申请号 JP19980330296 申请日期 1998.11.20
申请人 JAPAN NUCLEAR CYCLE DEVELOPMENT INST STATES OF PROJECTS;DENKI KAGAKU KOGYO KK 发明人 MARUYAMA TADASHI;ONOSE SHOJI;KIDOKORO TAKASHI;WATANABE SHOJIRO
分类号 G21C7/24;(IPC1-7):G21C7/24 主分类号 G21C7/24
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