Thermally stable microstructures and mechanical properties of B4C-Al composite with in-situ formed Mg（Al）B2
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第9期
论文作者：Yangtao Zhou Yuning Zan Shijian Zheng Xiaohong Shao Qianqian Jin Bo Zhang Quanzhao Wang Bolv Xiao Xiuliang Ma Zongyi Ma
文章页码：1825 - 1830
摘 要：B4C particulate-reinforced 6061 A1 composite was fabricated by powder metallurgy method.The as-rolled composite possesses high tensile strength which is comparable to that of the peak-aged 6061 A1 alloy.More importantly,the microstructures and mechanical properties are thermally stable during long-term holding at elevated temperature（400℃）.The microstructual contributions to the strength of the composite were discussed.Transmission electron microscopy（TEM）analysis indicates that the in-situ formed reinforcement Mg（Al）B2,as products of the interfacial reactions between B4C and the aluminum matrix,show not only good resistance to thermal coarsening but also strong pinning effect to the grain boundaries in the alloy matrix.
Yangtao Zhou1，Yuning Zan1，Shijian Zheng1，Xiaohong Shao1，Qianqian Jin1，Bo Zhang1，Quanzhao Wang2，Bolv Xiao1，Xiuliang Ma1,3，Zongyi Ma1
1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences2. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences3. School of Materials Science and Engineering, Lanzhou University of Technology
摘 要：B4C particulate-reinforced 6061 A1 composite was fabricated by powder metallurgy method.The as-rolled composite possesses high tensile strength which is comparable to that of the peak-aged 6061 A1 alloy.More importantly,the microstructures and mechanical properties are thermally stable during long-term holding at elevated temperature（400℃）.The microstructual contributions to the strength of the composite were discussed.Transmission electron microscopy（TEM）analysis indicates that the in-situ formed reinforcement Mg（Al）B2,as products of the interfacial reactions between B4C and the aluminum matrix,show not only good resistance to thermal coarsening but also strong pinning effect to the grain boundaries in the alloy matrix.
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