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《Chinese Journal of Rare Metals》 2008-01
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Extension Solid Solubility of Immiscible Cu-Cr Alloy System Induced by Mechanical Alloying

Wang Debao1,Wu Yucheng1,Wang Wenfang1,Zong Yue2 (1.School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;2.Composites Company,Hefei University of Technology,Hefei 230009,China)  
Cu-4%Cr and Cu-7%Cr(atomic fraction) binary powders were synthesized by mechanical alloying.XRD,SEM and TEM were used to investigate the microstructure of the powders during ball milling process,and the oxygen content and microhardness of the powders for different balling time were measured.The results showed that the grain size of the Cu-Cr alloy powders gradually changed to nanometer scale with the increasing of milling time and the lattice strain increased.After further milling,lattice parameter for copper increased,and the crystal lattice distortion reduced.The results also indicated that,after high energy ball milling for 40 h the solid solubility of Cr in Cu could be evidently extended,even though the equilibrium solid solubility of Cr in Cu was little,as the Cu-Cr alloy was immiscible system.
【Fund】: 安徽省“十五”二期科技攻关项目(040020392);; 合肥市重点科技攻关项目(20051044);; 安徽省自然科学基金(070414180)
【CateGory Index】: TG115.2
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