利用喷射成形技术制备了超高强Al12Zn2.4Mg1.1Cu合金.随后对试验合金进行热挤压,758 K固溶2 h和393 K时效20 h,利用透射电子显微镜(TEM)对时效后的合金进行形貌、选区电子衍射、高分辨像观察,得到各种沉淀相形貌和析出相与基体的位相关系.经过标定后确定,时效后的合金中存在3种纳米级沉淀相:η′相、GP(II)区、L12-Al3Zr,GP(II)区和Al3Zr与基体共格结合.
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