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研究了ＳｉＣ，Ａｌ＿２Ｏ＿３，ＳｉＯ＿２颗粒增强Ａｌ—４％Ｍｇ复合材料在凝固过程中，颗粒的种类、粒度对颗粒推挤导致颗粒分布不均匀的影响。提出在等轴晶凝固条件下，颗粒推挤的强烈程度由等轴晶粒和颗粒的质量比确定。理论预测与试验结果吻合良好。
The influence of particle type and particle size on the particle distribution caused by particle pushing in the solidification process of SiC, Al_2O_3 and SiO_2 particle reinforced Al-4% Mg composites was studied. It is proposed that under the condition of equiaxed solidification, the intensity of particle pushing is determined by the mass ratio of equiaxed grains and particles. The theoretical prediction is in good agreement with the experimental results.