采用真空半固态搅拌铸造法制备40％(体积分数)的高含量SiCp/A356复合材料;然后以40％ SiCp/A356复合材料为原料,采用“稀释法”分别制备出体积分数10％、20％、30％衍生SiCp/A356复合材料.通过对比分析高体积含量复合材料稀释制备的衍生复合材料(衍生材料)与直接搅拌制备的搅拌SiCp/A356复合材料(搅拌材料)的断口形貌,发现衍生材料的断口质量及颗粒分布均匀程度均优于相同颗粒含量搅拌材料的;不同颗粒含量的孔隙率、布氏硬度、力学性能变化规律具有稀释效应,即颗粒含量越低,对应数值越小;相同颗粒含量衍生材料的硬度比搅拌材料的高3％～5％左右,力学性能比搅拌材料的力学性能高9％～13％.
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