采用离心铸造法制备增强相质量分数为12%的 Al/B4C、Al/SiC、Al/Al2O3和 Al/TiB2复合材料并制成空心圆柱状试样。观察了所有试样外表面的显微组织特征及增强相的偏析。通过硬度和拉伸测试研究了不同增强相复合材料的梯度性能。结果表明，除 Al/B4C 外，所有复合材料外缘的硬度更高，所有复合材料外表面的拉伸强度更高。对所有复合材料的外缘进行摩擦磨损试验，结果表明 Al/TiB2复合材料的磨损率较小。
Functionally graded Al/B4C, Al/SiC, Al/Al2O3 and Al/TiB2 composites with constant 12% (mass fraction) of reinforcement were fabricated by centrifugal casting and hollow cylindrical components were obtained. Microstructural characteristics were investigated at outer surface of all composites and segregation of reinforcement particles was observed. Graded property of the composites with different reinforcements was investigated through hardness and tensile measurements. Results revealed that the outer peripheries of all composites exhibit higher hardness except in Al/B4C composite and the outer zones of all composites show higher tensile strength. Abrasive wear test was conducted on the outer peripheries of all composites and Al/TiB2 composite exhibits less wear rate.
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