机械合金化对Mg₂Ni相形成的影响

来源期刊：中国有色金属学报2001年第2期

论文作者：王仲民 曾美琴 杨永强 李伯林 朱敏

文章页码：236 - 239

关键词：Mg₂Ni合金； 机械合金化； 烧结处理

Key words：Mg₂Ni alloy； mechanical alloying; sintering

摘    要：用两步法(即由机械合金化和压制烧结两个步骤组成)制备了Mg₂Ni合金。实验证明：混合粉经机械合金化后，晶粒细化，增加了固态扩散的能力，有利于固相反应进行，使Mg₂Ni产率明显提高。不同温度烧结处理的结果表明：烧结温度是影响Mg₂Ni相形成的重要因素，烧结温度达到843 K，Mg-Ni粉基本能完全转变为Mg₂Ni相。

Abstract: Mg₂Ni alloy was prepared using a two-step process which includes mechanical alloying(MA) and sintering. It is found that the particles of mixed powder of Mg and Ni are fragmented; the grain size of Mg and Ni is greatly reduced and the density of Mg/Ni interface increases by MA; the refining of microstructure enhances the solid-diffusion reaction in sintering and results in the increasing of the ratio of Mg₂Ni formed. The results of sintering under different temperatures indicate that the formation of Mg₂Ni phase is obviously enhanced with the increasing of temperature， the highest ratio of Mg₂Ni forming is reached at 843 K.