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） 固溶体 Through X-ray diffraction, transmission electron microscopy, scanning electron microscopy analysis of the Cu 15Ni 8Sn ternary alloy mechanical alloying process of grain size, morphology and microstructure changes, and the evolution of the phase. As ball milling time increases, α-Cu grain size decreases, lattice parameters and strain increases. The process of powder particle morphology during ball milling is similar to that of binary alloys. It was found that the η  Cu6Sn5 metastable phase appeared after milling 3 h, then the phase was disordered, and finally formed nanocrystalline Cu (Ni, Sn) solid solution