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SiCp/Al-Si基复合材料制备工艺的研究现状

Study on effect of preparation technology of SiCp/Al-Si matrix composites on microstructure properties

  • 摘要: 碳化硅颗粒增强铝硅基复合材料由于其具有高的比强度、高的比刚度,耐磨性良好和不易变形等优点,作为结构功能材料在车辆交通、航空航天和精密仪器等领域有着广阔的应用前景。但其在制备和加工过程中会受到热/应力场耦合作用,复合材料微观组织中会出现界面反应、增强相的偏聚、Si相及金属间化合物相的多尺度析出及微观结构演变现象,这对于复合材料力学性能的调控是不利的。主要总结了粉末冶金、搅拌铸造、浸渗制备和喷射沉积几种较为成熟的制备工艺的优缺点,并分析了几种制备工艺在参数变量上对复合材料组织和性能的影响。

     

    Abstract: Silicon carbide particle reinforced aluminum-silicon matrix composites have broad application prospects as structural functional materials in vehicle traffic, aerospace and precision instruments because of their high specific strength, high specific stiffness, good wear resistance and easy deformation. However, the coupling effect of thermal/stress field will occur in the preparation and processing of the composites, resulting in interface reaction, segregation of reinforcement phase, multi-scale precipitation of Si phase and intermetallic compound phase and microstructure evolution, which are unfavorable to the regulation of the mechanical properties of the composites. In this paper, the advantages and disadvantages of several mature preparation processes such as powder metallurgy, stir casting, impregnation and jet deposition are reviewed, and the effects of several preparation processes on the microstructure and properties of composites are analyzed

     

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