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研究了超高压（５．５ ＧＰａ）条件下凝固的过共晶 ＡＩ－Ｓｉ合金的非平衡组织．结果表明：过共晶成分合金中出现大量初生α 相，并有α＋β＋（α＋β）共晶的共生组织， Ｓｉ在α相中的固溶度和Ａｌ在β相中的固溶度都有极大增加．讨论了高压对凝固组织 的影响
The non-equilibrium microstructure of hypereutectic AI-Si alloy solidified under ultra-high pressure (5.5 GPa) was investigated. The results show that there are a large amount of primary α phase and α + β + (α + β) eutectic in the hypereutectic alloy. The solid solubility of Si in α phase and the solid solubility of Al in β phase are extremely high increase. The effect of high pressure on the solidified tissue was discussed