Cu15Ni8Sn合金的机械合金化

MECHANICAL ALLOYING OF Cu 15Ni 8Sn POWDER MIXTURE

通过Ｘ 射线衍射仪、透射电镜、扫描电镜分析了Ｃｕ１５Ｎｉ８Ｓｎ 三元合金的机械合金化过程中晶粒尺寸、形貌和微结构变化， 以及相的演变。随着球磨时间的增加， αＣｕ 晶粒尺寸减少， 点阵参数与应变量增大。球磨过程中粉末颗粒形貌变化过程与二元系合金相似。发现了球磨３ ｈ 有ηＣｕ６Ｓｎ５亚稳相出现， 随后该相无序化， 最终形成了纳米晶超饱和Ｃｕ（Ｎｉ，Ｓｎ）

The changes in grain size, morphology and microstrcture, as well as the phase evolution of Cu 15Ni 8Sn (%) element powder during mechanical alloying were investigated by XRD, TEM and SEM. The grain size decreases, but the lattice parameter and the strain increase with the ball milling time increasing. The evolution of the powder particle morphology is similar to that of binary alloys during mechanical alloying. It was also found that a η Cu 6Sn 5 phase appeared after milling for about 3 h, then it was disorder. Finally, a nanocrystalline supersaturated Cu(Ni, Sn)solid solution was formed.