机械合金化方法制备银镍触头合金的研究

Preparation of Silver-Nickel Conta ct Materials by Mechanical Alloying

摘要:

采用机械合金化和热压方法制备Ag90Ni10及Ag70Ni30触头合金。机械合金化过程中形成Ni固溶于Ag基体的过饱和固溶体，热压时从银固溶体基体上析出弥散细小的镍强化相。与传统粉末冶金相比，组织更为弥散、细小、均匀。

Abstract:

Ag 90 Ni 10 and Ag 70 Ni 30 alloys were prepared by mechanical a lloying(MA)and hot-pressing(HP)techniques.About 10wt%nickel dissolved in silver matrix during MA,which formed over saturation solut ion.In the HP process,the fine solut ion precipitates and dispersive nickel particles were deposited as s trengthening phrase.The final microstructure consists of finer and more dispersive nickel particles in sil ver matrix than that of conventional pow der-metallurgy AgNi contacts.