对SiC颗粒增强Al-Si复合材料以及Al-Si合金进行激光表面重熔处理,分析了SiC颗粒在快速凝固条件下的分布规律以及SiC颗粒对合金基体凝固行为的影响.结果表明: SiC颗粒不会被快速移动的凝固界面所推移;颗粒对基体凝固组织中的相组成无影响,但对凝固初生相的晶体生长有抑制作用.从颗粒与合金熔体的交互作用角度对实验结果进行了讨论.
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