(1哈爾濱工業(yè)大學材料科學與工程學院，哈爾濱 150001
2 中國科學院金屬研究所快速凝固非平衡合金國家重點實驗室，沈陽 110015)
摘 要: 以Al-Cu-Fe和Al-Fe-V-Si兩個合金系為基礎，對合金成分進行了優(yōu)化設計，組成了 Al-Fe-Cu-V-Si-Ni-Ce-Zr合金。對超音速氣體霧化快速凝固的上述合金粉末進行的研究表明，新的合金中同時形成原來兩個合金系中的析出相；在61 μm的粉末中，沒有發(fā)現(xiàn)第三種析出相。熱分析試驗和400 ℃熱處理試樣的X射線衍射結果，證明該合金中的析出相在400℃以下具有相當好的穩(wěn)定性。
關鍵字: 快速凝固 耐熱鋁合金 彌散相 熱穩(wěn)定性
（1 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
2 State Key Laboratory for Rapidly Solidified Non-equilibrium Alloys,
Institute of Metal Research, Chinese Academy of Science, Shenyang 110015, P. R. China）
Abstract:Based on Al-Cu-Fe and Al-Fe-V-Si alloys, the Al-Fe-Cu-V-Si-Ni-Ce-Zr alloy has been prepared by the optimization design of chemical compositions. The investigation on rapidly solidified powders produced by ultrasonic gas atomization showed that the two kinds of dispersoids presented in Al-Cu-Fe and Al-Fe-V-Si alloys have simultaneously reformed in the new alloy, there is not any other dispersoid in the powders below 61μm. The results of differential thermal analysis and X-ray diffraction of heat treated powders at 400℃ proved that the dispersoids in the alloy possess proper thermal stability and it is possible to be a newly high strength and high temperature aluminum alloy.
Key words: rapid solidification; high temperature aluminum alloys; dispersoid; thermal stability
