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通过X射线衍射仪,电子显微镜和Pulverisette5行星式球磨机研究了3Cu-2Mg-Al粉末在球磨过程中的机械化学变化。结果表明,随球磨时间的延长,3Cu-2Mg-Al粉末晶粒尺寸减小,显微应变和有效温度系数增加;晶粒尺寸与有效温度系数和显微应变呈逆变关系,显微应变随有效温度系数增加而增大;球磨30 h后,Mg衍射峰完全消失,球磨至60 h,Al衍射峰也完全消失,Cu衍射峰进一步宽化,此时,Cu衍射峰位置向小角度偏移,形成了Mg和Al在Cu中的过饱和固溶体;球磨90 h后,有新相Mg32Al47Cu7生成。
The mechanical and chemical changes of 3Cu-2Mg-Al powders during ball milling were investigated by X-ray diffraction, electron microscopy and Pulverisette5 planetary ball mills. The results show that the grain size of 3Cu-2Mg-Al powder decreases with the increase of ball milling time, the micro-strain and effective temperature coefficient increase. The grain size is inversely related to the effective temperature coefficient and the micro-strain, The effective temperature coefficient increases and increases; After 30 h of milling, the diffraction peak of Mg disappears completely, and after 60 h milling, the diffraction peak of Al disappears completely and the diffraction peak of Cu further broadens. At this time, the position of Cu diffraction peak shifts to a small angle , A supersaturated solid solution of Mg and Al in Cu was formed. After milling for 90 h, a new phase Mg32Al47Cu7 was formed.