Development of a Prototype Thermodynamic Database for Nd-Fe-B Permanent Magnets

被引：0

作者：

Abe T. ^{[1
]}

Morishita M. ^{[2
]}

Chen Y. ^{[3
]}

Saengdeejing A. ^{[3
]}

Hashimoto K. ^{[1
]}

Kobayashi Y. ^{[4
]}

Ohnuma I. ^{[1
]}

Koyama T. ^{[5
]}

Hirosawa S. ^{[1
]}

机构：

[1] Elements Strategy Initiative Center for Magnet Materials (ESICMM), National Institute for Materials Science, 1-2-1 Sengen, Tsukuba

[2] School of Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji

[3] School of Engineering, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai

[4] Dept. Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo

[5] Nagoya University, Graduate School of Engineering, Furo-cho, Chikusa-ku, Nagoya

来源：

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | 2022年 / 69卷

关键词：

Gibbs energy; Metastable states; Phase equilibria; Thermodynamic database;

D O I：

10.2497/jjspm.69.S52

中图分类号：

学科分类号：

摘要：

For the Nd-Fe-B permanent magnets, a prototype thermodynamic database of the 8-element system (Nd, Fe, B, Al, Co, Cu, Dy, Ga) was constructed based on literature data and assessed parameters in the present work. The magnetic excess Gibbs energy of the Nd2Fe14B compound was reassessed using thoroughly measured heat capacity data. The Dy-Nd binary system was reassessed based on formation energies estimated from ab initio calculations. The constructed database was applied successfully for estimations of phase equilibria during the grain boundary diffusion processes (GBDP) and the reactions in the hydrogenation decomposition desorption recombination (HDDR) processes. ©2022 Japan Society of Powder and Powder Metallurgy.

引用

页码：S52 / S62

页数：10

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