Development of a Prototype Thermodynamic Database for Nd-Fe-B Permanent Magnets
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- ABE Taichi
- Elements Strategy Initiative Center for Magnet Materials (ESICMM), National Institute for Materials Science
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- MORISHITA Masao
- School of Engineering and Graduate School of Engineering, University of Hyogo
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- CHEN Ying
- School of Engineering, Tohoku University
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- SAENGDEEJING Arkapol
- School of Engineering, Tohoku University
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- HASHIMOTO Kiyoshi
- Elements Strategy Initiative Center for Magnet Materials (ESICMM), National Institute for Materials Science
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- KOBAYASHI Yoshinao
- Dept. Materials Science and Engineering, Tokyo Institute of Technology
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- OHNUMA Ikuo
- Elements Strategy Initiative Center for Magnet Materials (ESICMM), National Institute for Materials Science
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- KOYAMA Toshiyuki
- Nagoya University, Graduate School of Engineering
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- HIROSAWA Satoshi
- Elements Strategy Initiative Center for Magnet Materials (ESICMM), National Institute for Materials Science
Bibliographic Information
- Other Title
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- Nd-Fe-B磁石用プロトタイプ熱力学データベースの構築
Description
<p>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.</p>
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 69 (Supplement), S52-S62, 2022-01-30
Japan Society of Powder and Powder Metallurgy
