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采用X射线衍射(XRD)仪与透射电镜(TEM)选区电子衍射(SAED)对不同组分Cu-Cr、Cu-Mo高能球磨粉末在机械合金化过程中的相演变特征进行了研究,Mo在Cu中以晶格固溶为主,通过机械合金化手段扩展Mo在Cu中的固溶度有限,随着Mo组分含量增加,Cu晶粒尺寸变小,Mo在Cu中固溶度增大,Cu-80%Mo球磨产物中有非晶相出现。Cr在Cu中的固溶以晶界亚互溶为主,球磨强度影响Cu-50%Cr(质量分数)合金化产物,较高球磨强度下生成Cu纳米晶与Cr的氧化物。
The phase evolution characteristics of Cu-Cr and Cu-Mo high energy ball milling powders during mechanical alloying were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM) In Cu, the solid solution is mainly lattice, and the solubility of Cu in Cu is limited by mechanical alloying. With the increase of Mo content, the grain size of Cu becomes smaller and the solubility of Mo in Cu increases , Cu-80% Mo milled products appear amorphous phase. The solid solution of Cr in Cu is dominated by grain boundary sub-miscibility. The ball milling strength affects Cu-50% Cr (mass fraction) alloying product, and Cu nanocrystalline and Cr oxides are formed at higher ball milling strength.