重稀土耐热镁合金的研究现状及发展  

Research and Development of Heat Resistant Magnesium-Heavy Rare Earth Alloys

作　　者：刘宝忠[1] 范燕平[1] 刘娇娇[1] 彭秋明[2] 

机构地区：[1]河南理工大学材料学院,焦作454000 [2]燕山大学材料科学与工程学院,秦皇岛066000

出　　处：《材料导报》2012年第11期110-113,118,共5页Materials Reports

基　　金：国家自然科学基金(51001043);中国博士后特别资助(201104390);中国博士后基金(20100470990)

摘　　要：重稀土元素在金属镁中有较大的固溶度,且固溶度随温度的降低急剧减小,热处理后固溶强化及时效强化效果明显,因此,重稀土耐热镁合金成为研究的热点。重点介绍了Mg-Y、Mg-Gd、Mg-Ho几种重稀土耐热镁合金及其研究现状,分析了Y、Gd、Ho重稀土元素的性质,在耐热镁合金中的作用及强化镁合金的机理,总结了重稀土耐热镁合金在应用中存在的问题,并对其发展及应用提出了具体看法。The heavy rare earth（HRE） elements have large solubility in Mg matrix at high temperature and rapid decrease with lowering temperature. The Mg-HRE alloys show remarkable solution strengthening and age-hardening response after heat processing, and are considered as the most promising heat resistance Mg alloys. The current researches of Mg-Y, Mg-Gd and Mg-Ho alloys are introduced, the characteristics of Y, Gd and Ho element, the effects of HRE in Mg and strengthening mechanism of magnesium alloys are analyzed, and the problems of Mg-HRE alloys in application are discussed. The developments and applications of Mg-HRE alloys are also prospected.

关 键 词：重稀土 镁合金 强化机理 

分 类 号：TG146.22[一般工业技术—材料科学与工程]