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.
Phase transformation of Cu-Cr and Cu-Mo alloyed powders of different constitutes was investigated by X-ray diffraction (XRD) and TEM.Results show that Mo mainly dissolves in Cu lattice,and the solid solubility extension of Mo in Cu by mechanical alloying is limited.As Mo content increases,Cu grain size decreases,and the saturated amount of Mo in Cu increases.Amorphous phase appears in the Cu-80％Mo alloyed powder.Cu-Cr solid solution belongs to nano grain boundary solution.The alloyed product of Cu-50wt％Cr is affected by milling intensity.Cu nano crystallites and Cr oxides are formed with high milling intensity.
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