静高压下Cu－Si块状纳米合金的制备与表征  

THEPREPARATION AND CHARACTERIZATION OFBULKCu-Si NANOCRYSTALLINEALLOY UNDER HIGH PRESSURE

作　　者：姚斌[1] 丁炳哲[1] 李冬剑 王爱民[1] 李淑玲[1] 胡壮麒[1] 苏文辉[1] 耿义志[1] 胡安广 幸志明[1] 华忠[1] 

机构地区：[1]中国科学院金属研究所,吉林大学物理系固体物理教研室,四平师范学院固体物理研究所

出　　处：《高压物理学报》1995年第2期117-123,共7页Chinese Journal of High Pressure Physics

基　　金：中国科学院金属研究所快速凝固非平衡合金国家重点实验室资助

摘　　要：用压淬的方法，在６ＧＰａ静高压下，以２００Ｋ／ｓ的冷却速率冷却熔融状态的Ｃｕ＿（７０）Ｓｉ＿（３０）合金，制备出块状Ｃｕ－Ｓｉ纳米合金．Ｘ射线衍射和透射电子显微镜分析表明：该纳米合金由γ－Ｃｕ＿５Ｓｉ和一未知相组成，未知相为简单立方晶体，晶格常数α＝０．８５３５ｎｍ，其热力学状态为亚稳态。并对静高压下块状纳米合金的形成机理进行了探讨。TheCu-Si nanocrystalline(NC)alloy was prepared by quenching the melted Cu_(70)Si_(30) alloy at cooling rate 200K/s under a pressure of 6GPa. The bulk Cu_(70)Si_(30)NC alloy consists ofγ-Cu_5Si and an unknown phases.The crystal structure of the unknown phase is simple cubic sys-tem and lattice constant is0.8535nm. The thermostability of the bulk Cu_(70)Si_(30) NC alloy was car-ried out and an endothermic peak was observed,enthalpy of which is 2.66 7 5J/g.The formationmechanism of the bulk Cu_(70)Si_(30) alloy under high pressure was discussed.

关 键 词：纳米合金 压淬 过冷度 铜硅合金 

分 类 号：TG139.8[一般工业技术—材料科学与工程]