Microstructure and Mechanical Properties of FeAl Intermetallics Prepared by Mechanical Alloying and Hot-Pressing

作     者：宋海霞 吴运新 唐传安 袁帅 巩前明 梁吉 

作者机构：Department of Mechanical Engineering Tsinghua UniversityBeijing 100084 China Department of Mechanical Engineering Army Aviation Institute of PLABeijing 101123 China 

出 版 物：《Tsinghua Science and Technology》 (清华大学学报（自然科学版（英文版）)

年 卷 期：2009年第14卷第3期

页      面：300-306页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China(No. 50574052) 

主　　题：FeAl intermetallics mechanical alloying powder hot-pressing flexural strength 

摘      要：FeAl intermetallics were prepared by mechanical alloying and vacuum hot-pressing. The Fe-48 at.% Al powder was ball-milled for 3-12 h, producing a solid solution structure of Fe （Al） with trace Al （Fe）. Subsequent vacuum annealing or hot-pressing introduced phase transformations into the FeAl （B2） intermetallics and Al2O3 inclusions. The hot-pressed FeAI intermetallics possess a high flexural strength of 831 MPa and a fairly good strain at break of 3.2%. The results show that the addition of 0.5 at.% B reduces the peak temperature for hot-pressing from 1180℃ to 1100℃, and increases the density of the compacts from 95% to 96.3%, but results in no significant improvement in the mechanical properties.