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用ＴＥＭ对铸态ＳｉＣｐ／Ｍｇ（ＡＺ８１）复合材料界面进行了研究。结果表明，ＳｉＣ颗粒与α－Ｍｇ界面光滑，无界面化学反应。Ｍｇ１７Ａｌ１２相及Ｃｕ５Ｚｎ８相能在ＳｉＣ颗粒表面形核长大，且它们之间的位向关系为：［１１－０１］ＳｉＣ‖［１１－１］Ｍｇ１７Ａｌ１２，（０１１－１）ＳｉＣ‖（１１０）Ｍｇ１７Ａｌ１２和［１００］Ｃｕ５Ｚｎ８‖［２１－１－０］ＳｉＣ，（００１）Ｃｕ５Ｚｎ８‖（０００１）ＳｉＣ。
The interface of as-cast SiCp / Mg (AZ81) composites was investigated by TEM. The results show that SiC particles have a smooth interface with α-Mg and no interfacial chemical reaction. The Mg17Al12 phase and Cu5Zn8 phase nucleate and grow on the surface of SiC particles, and the orientation relationship between them is: [11-01] SiC “[11-1] Mg17Al12, (011-1) SiC” (110) Mg17Al12 And [100] Cu5Zn8 “[21-1-0] SiC, (001) Cu5Zn8” (0001) SiC.