基于真空烧结的Al-B_4C中子吸收材料的制备及性能研究  

Manufacture and Properties of Al-B_4C Neutron Absorption Materials Based on Vacuum Sintering

作　　者：李奎江 邹树梁[1] 唐德文[1,2] 肖畅飞 刘昌福 LI Kuijiang;ZOU Shuliang;TANG Dewen;XIAO Changfei;LIU Changfu(Hunan Key Laboratory of Nuclear Facilities Emergency Sat）ty Technology and Equipment,University of South China,Hengyang,Hunan 421001,China;School of Mechanical Engineering,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学核设施应急安全作业技术与装备湖南省重点实验室,湖南衡阳421001 [2]南华大学机械工程学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2018年第5期70-75,共6页Journal of University of South China：Science and Technology

基　　金：湖南省研究生科研创新资助项目(CX2017B526)

摘　　要：B_4C是一种常见的中子吸收材料,采用真空烧结的方法制备不同成分配比的Al-B_4C复合材料,并对材料的微观组织,力学性能进行分析,研究结果表明:基体Al相和增强相B_4C颗粒之间分布比较均匀,气孔裂纹等缺陷较少,复合材料抗拉强度,屈服强度,断后伸长率随着碳化硼含量的增加逐渐减小,复合材料的断裂方式既有B_4C颗粒的解理断裂,也有铝基体的韧性撕裂,以B_4C颗粒的断裂和拔出为主,是韧性断裂与脆性断裂综合作用的结果.B4C is a common neutron absorbing materiahIn this paper, diffrent A1-B4C composites were manufactured by vacuum sintering, and the mierostrueture and mechanical proper6es of the composites were analyzed.The results show that the distribution of the A1 phase and the reinforeing phase B4C particles are relatively uniform. There are lower detects such as blowhole and cracks.The tensile strength, yield strength and elongation alter fracture of composites decrease with the increase of boron carbide content. The fracture modes of composites include not only the cleavage fracture of B4C particles, but also the ductile tearing of aluminum matrix ,and the fracture and extraction of B4C particles, which is the result of the comprehensive action of ductile fracture and brittle fracture.

关 键 词：Al—B4C复合材料 真空烧结 微观组织 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]