Preparation and Mechanical Properties of-SiC Nanoparticle Reinforced Aluminum Matrix Composite by a Multi-step Powder Metallurgy Process
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第6期
论文作者：WANG Linong WU Hao WU Xingping CHEN Minghai LIU Ning
文章页码：1059 - 1063
摘 要：β-SiC nanoparticle reinforced Al matrix（nano-SiCp/Al） composite was prepared by a multi- step powder metallurgy strategy including presureless sintering, hot compacting process and hot extrusion. The microstructures of the as-prepared composites were observed by scanning electronic microscopy（SEM）, and the mechanical properties were characterized by tensile strength measurement and Brinell hardness test. The experimental results revealed that the tensile strength of the composite with the addition of 5wt%-SiC nanoprticles could be increased to 215 MPa, increasing by 110% compared with pure Al matrix. Comparative experiments reflected that the-SiC nanoprticles showed significant reinforcement effect than traditional-SiC micro-sized particles. The preparation process and sintering procedure were investigated to develop a cost effective preparation strategy to fabricate nano-SiCp/Al composite.
WANG Linong1，WU Hao2,3,4，WU Xingping2,3，CHEN Minghai2，LIU Ning3
1. School of Electrical Engineering,Wuhan University2. Suzhou Institute of Nano-tech and Nano-bionics,Chinese Academy of Sciences3. School of Materials Science and Engineering,Hefei University of Technology4. Wuhan Nari Co.,Ltd.,State of Grid Electric Power Research Institute
摘 要：β-SiC nanoparticle reinforced Al matrix（nano-SiCp/Al） composite was prepared by a multi- step powder metallurgy strategy including presureless sintering, hot compacting process and hot extrusion. The microstructures of the as-prepared composites were observed by scanning electronic microscopy（SEM）, and the mechanical properties were characterized by tensile strength measurement and Brinell hardness test. The experimental results revealed that the tensile strength of the composite with the addition of 5wt%-SiC nanoprticles could be increased to 215 MPa, increasing by 110% compared with pure Al matrix. Comparative experiments reflected that the-SiC nanoprticles showed significant reinforcement effect than traditional-SiC micro-sized particles. The preparation process and sintering procedure were investigated to develop a cost effective preparation strategy to fabricate nano-SiCp/Al composite.
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