机械合金化-退火法制备两相区铝钌合金粉  

Preparation of Dual-phase Region Al-Ru Alloy Powders by Mechanical Milling and Following Anneal

作　　者：柴宗霞[1] 白富栋[1] 李廷举[1] 吕连海[2] 

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116085 [2]大连理工大学精细化工国家重点实验室,辽宁大连116085

出　　处：《机械工程材料》2009年第4期10-13,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50674018)

摘　　要：采用机械合金化-退火法制备了钌质量分数为50%的纳米铝钌合金粉,研究了在机械合金化过程中合金粉的物相组成、平均晶粒尺寸和微观应变随球磨时间的变化规律,并分析了退火温度和退火时间对合金粉物相组成的影响。结果表明:随着球磨时间的延长,合金粉的平均晶粒尺寸不断减小,微观应变先增大后减小;球磨50 h后铝原子全部固溶于钌中,形成Ru(Al)固溶体;退火处理使Ru(Al)固溶体转变成铝钌金属间化合物,微观应变降低;550℃退火主要生成Al2Ru和Al5Ru2两种金属间化合物相,700℃退火主要生成Al2Ru、Al13Ru4和少量Al5Ru2金属间化合物相;退火时间对合金粉的物相组成影响不大。The Al-Ru alloy nano-powders containing 50 wt% Ru were prepared by mechanical alloying and following anneal method. The change of phase compositions, average grain size and micro-strain of the alloy powders with the milling time during the mechanical milling process was observed and the effect of anneal temperature and anneal time on the phase compositions was also analyzed. The results indicate that with the increase of milling time, the average grain size of the alloy powders decreased but the micro-strain firstly increasd and then decreased. Al atoms dissolved into the Ru crystal completely after milling for 50 h and formed Ru（Al） solid solution. The solid solution transformed into Al-Ru intermetallics and the micro-strain decreased after anneal. The alloy powders milled for 50 h mainly composed of Al2 Ru and Al5 Rue two phases after annealed at 550 ℃, while they composed of Al2 Ru4 Al13 Ru4 and a little Al5 Ru2 phases after annealed at 700℃. Anneal time had slight influence on the phase compositions of the alloy powders.

关 键 词：铝钌合金粉 机械合金化 退火 晶粒尺寸 微观应变 

分 类 号：TG146.4[一般工业技术—材料科学与工程]