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研究了在定向凝固条件下，在亚共晶二元Ａｌ－Ｌｉ合金中获得共晶复合材料的晶体生长准则，并观察了组织形貌．结果表明，当６．５×１０~５Ｋ·ｓ·ｃｍ~（－２）≤Ｇ_Ｌ／Ｒ＜１１×１０~５Ｋ·ｓ·ｃｍ~（－２）时，晶体可以保持稳定的平面固－液界面生长，得到规则的共晶复合组织．二元Ａｌ－Ｌｉ合金共晶组织中β相（ＡｌＬｉ）为棒状形貌．
The crystal growth rules of the eutectic binary Al-Li alloy obtained under the condition of directional solidification were studied and the morphology of the microstructure was observed. The results show that the crystal can maintain a stable planar solid - liquid at 6.5 × 10 ~ 5K · s · cm ~ (-2) ≤G_L / R <11 × 10 ~ 5K · s · cm ~ (-2) The interface grows to give regular eutectic composite structure. The β phase (AlLi) in the binary Al-Li alloy eutectic structure is a rod-like morphology.