【摘要】 将CU－C3．3％－Til3．3％和CU－Cu02．5％－Al11．1％（质量分数）二合金粉末分别进行机械合金化，结果发现，经20h球磨后，C的衍射峰已经消失，Ti、Al、CuO的衍射峰强度显著降低；60h球磨后，二合金粉末都形成了Cu基过饱和固溶体；100h球磨后，部分Ti、C、Al、O溶质元素脱溶析出，并反应生成TiC和Al2O3。机械合金化导致粉末细化、亚晶界和位错等缺陷产生是形成过饱和固溶体和促进第二相析出的重要原因。更多还原

【Abstract】 Cu-C3.3% -Ti13.3% and Cu- Cu02.5% - Al11. 1% powders were mechanically alloyed. The experimental results show that XRD - pattern Peak of carbon vanished and that of Ti,Al and CuO decreased obviously in the powers after milling for 20h. In both powders, Cu-based supersaturated solid solutions were formed ther after milling for 60h. The partial precipitation of Ti .C .Al.O solute elements led to the production of TiC and A12O3 after milling for 100h. Powder refinement and emergence of defects such as subinterface and dislocation induced by mechanical alloying, are main causes of formation of supersaturated solid solution and precipitation of secondary phase.更多还原