摘要
采用粉末冶金法制备了ZrH2/W/B4C/Al复合材料,研究了屏蔽组元的分散均匀性、材料的力学性能和快中子慢化性能。通过扫描电子显微镜(SEM)和X射线无损检测分析方法检测了材料的微观分散性和宏观分散性,检测结果表明,采用本文所述的制备工艺实现了屏蔽组元在铝基体中的均匀分散。分析了热等静压后材料的相结构和微观组织结构,分析认为在Zr H2/W/B4C/Al复合材料的热等静压过程中,Al和Zr H2两相之间在高温条件下容易发生物相反应,生成Zr Al3相,而采用合适的热等静压工艺可以避免这种有害反应的发生。研究结果表明,当热等静压温度为540℃时,材料内部没有发生物相反应,材料的致密度和力学性能良好。采用DT中子源,测试了14. 88 Me V快中子穿过测试样品的中子能谱和无样品时的源中子能谱。测试结果表明,快中子经80 mm厚的样品屏蔽后,中子能量有了显著降低,材料对快中子具有良好的慢化效果。
ZrH2/W/B4 C/Al composite was produced by powder metallurgy method. The dispersion of shielding component,the mechanical properties and fast neutron moderation properties of the material were studied. The microscopic and macroscopic dispersion of the material was examined by scanning electron microscope（ SEM） and X-ray nondestructive testing methods. The testing results showed that the shielding components were uniformly dispersed in the aluminum matrix by the preparation procedure. The phase structure and microstructure of the material after hot isostatic pressing（ HIP） were analyzed. Al and Zr H2 phases were prone to generate Zr Al3 phase in high temperature condition during HIP for Zr H2/W/B4 C/Al composite. It could avoid this kind of harmful reaction by adopting proper HIP parameters. The results showed that no phase reaction was found after HIP at 540 ℃. The density and mechanical properties of the material were good. Neutron spectrums of 14. 88 MeV fast neutron passing through the test sample and the source neutron were tested using DT neutron source. The results showed that neutron energy was significantly reduced after the fast neutron was shielded by 80 mm thick sample. The material had good moderation ability to the fast neutron.
作者
杨剑
马书旺
刘坤
梁秋实
王健
毛昌辉
Yang Jian;Ma Shuwang;Liu Kun;Liang Qiushi;Wang Jian;Mao Changhui(Advanced Electronic Materials Institute,General Research Institute for Nonferrous Metals,Beijing 100088,China)
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2018年第12期1267-1272,共6页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(51477012)资助
关键词
铝基复合材料
材料制备
力学性能
屏蔽性能
aluminum matrix composite
material preparation
mechanical property
shielding performance
