为了优化压铸态Al2O3f/Al-15Si复合材料中Si相组织,利用金相和SEM分析了Al-15Si合金和Al2O3f/Al-15Si复合材料中Si相在不同冷却方式下的形貌特征.结果表明:压铸态和重熔后炉冷态的Al-15Si合金中共晶Si均为片状,而Al2O3f/Al-15Si复合材料内共晶Si由片状转变为棒状;Al2O3f/Al-15Si复合材料750℃重熔后在水淬、模具中冷却和炉冷冷却条件下分别获得了细小变质态、针状及棒状等形态的Si相;炉冷处理可作为优化压铸态复合材料组织的一种途径.
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