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研究了ｃＣｅ≥４５％（ｗｔ）的混合稀土对ＺＡ－２７合金显微组织及高温机械性能的影响。结果表明，在锌铝合金中，稀土元素可与Ａｌ、Ｚｎ、Ｃｕ等形成多种复杂成分化合物，其硬度高，热硬性好，分散于晶界或枝晶间，细化了组织，且有效地阻碍了高温时基体的变形和晶界移动。添加适量的稀土，可使ＺＡ－２７合金在１５０℃时的抗拉强度提高３０％，硬度提高２５％，延伸率虽有所下降，但冲击韧性却得以改善。同时发现，室温强度变化不大，唯塑性、韧性略有下降。
The effect of rare earth with cCe≥45% (wt) on the microstructure and high temperature mechanical properties of ZA-27 alloy was studied. The results show that rare earth elements can form complex compounds with Al, Zn, Cu and so on, which have high hardness and good thermosetting properties. They are dispersed in the grain boundaries or dendrites, refine the microstructure and are effective Hindered the deformation of the substrate at high temperature and grain boundary movement. Adding appropriate amount of rare earth, ZA-27 alloy can improve the tensile strength at 150 ℃ 30%, the hardness increased by 25%, although the elongation decreased, but the impact toughness has been improved. Also found that little change in room temperature strength, plasticity, toughness decreased slightly.