The crystallization behavior of as-quenched Nd9Fe85Nb0.5B5.5 alloys

被引：9
|
作者：
Men, Kuo [1 ]
Li, Kuoshe [1 ]
Luo, Yang [1 ]
Yu, Dunbo [1 ]
Zhang, Kun [1 ]
Jin, Jinling [1 ]
Mao, Yongjun [1 ]
机构：
[1] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 635卷
基金：
中国国家自然科学基金;
关键词：
Crystallization; Metastable phase; Autocatalysis kinetic equation; MAGNETIC-PROPERTIES; THERMAL-ANALYSIS; PHASE; MICROSTRUCTURE; KINETICS; DROPLETS; GLASSES; RIBBONS;
D O I：
10.1016/j.jallcom.2015.02.046
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The crystallization behavior of as-quenched Nd9Fe85Nb0.5B5.5 alloy was investigated in order to gain further understanding of the structural evolution of the alpha-Fe and metastable phase, and then verified it by TEM. The result shows that the crystallization can be viewed as a process consisted of the following two steps. Firstly, the TbCu7-type metastable phase and a small amount of alpha-Fe precipitate from the matrix. Then, the TbCu7-type metastable phase is decomposed into the alpha-Fe and Nd2Fe14B phase with suitable sizes. The decomposition of metastable phase can promote the crystallization of Nd2Fe14B phase, so it could be considered as an 'autocatalysis' process. In addition, the crystallization kinetic parameters of the Nd2Fe14B phase have also been obtained base on the resolved differential scanning calorimetry peaks. The results provide a physical and dynamic insight into the crystallization behavior of as-quenched Nd9Fe85Nb0.5B5.5 alloys. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：61 / 65
页数：5
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