Influence of RE-rich phase distribution in initial alloy on anisotropy of HDDR powders

作     者：蔡岭文 郭帅 丁广飞 陈仁杰 刘剑 李东 闫阿儒 

作者机构：Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technology and EngineeringChinese Academy of Sciences Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Material Technology and EngineeringChinese Academy of Sciences University of Dayton 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2015年第24卷第9期

页      面：523-526页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51101167) the Ningbo Natural Science Foundation,China(Grant No.2013A610075) the Ningbo Science and Technology Project,China(Grant No.2013B10004) the Program of International Science and Technology Cooperation of China(Grant No.2010DFB53770) the China Postdoctoral Science Foundation(Grant No.2012M520943) the State Key Program of the National Natural Science Foundation of China(Grant No.2011AA03A401) the National Key Technologies R&D Program of China(Grant No.2012BAE01B03) 

主　　题：hydrogenation disproportionation desorption recombination(HDDR) anisotropy RE-rich phase initial microstructure 

摘      要：The influence of the RE-rich phase distribution in the precursor alloys on the anisotropy of the hydrogenation disproportionation desorption recombination（HDDR） processed powders is investigated. The homogenized ingot alloy and the as-cast strip casting（SC） alloy with a uniform RE-rich grain boundary phase lead to high anisotropy of the refined powders,acquiring degrees of alignment（DOA） of 0.62 and 0.54, respectively. The RE-rich phase aggregation results in a deteriorated DOA of the powders due to the drastic disproportionation rate, while a thin and uniform RE-rich phase distribution is beneficial for DOA. A reaction model of the initial particle microstructure is proposed for optimizing the HDDR powder anisotropy.