Development of a prototype thermodynamic database for Nd-Fe-B permanent magnets

被引：9

作者：

Abe, Taichi ^{[1
]}

Morishita, Masao ^{[2
]}

Chen, Ying ^{[3
]}

Saengdeejing, Arkapol ^{[3
]}

Hashimoto, Kiyoshi ^{[1
]}

Kobayashi, Yoshinao ^{[4
]}

Ohnuma, Ikuo ^{[1
]}

Koyama, Toshiyuki ^{[5
]}

Hirosawa, Satoshi ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Elements Strategy Initiat Ctr Magnet Mat ESICMM, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Hyogo, Dept Chem Engn & Mat Sci, Kobe, Hyogo, Japan

[3] Tohoku Univ, Sch Engn, Sendai, Miyagi, Japan

[4] Tokyo Inst Technol, Dept Mat Sci & Engn, Tokyo, Japan

[5] Nagoya Univ, Dept Mat Design Innovat Engn, Nagoya, Aichi, Japan

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2021年 / 22卷 / 01期

关键词：

Thermodynamic database; Gibbs energy; phase equilibria; metastable states; BOUNDARY DIFFUSION PROCESS; GRAIN-BOUNDARY; PHASE-DIAGRAMS; COERCIVITY ENHANCEMENT; CU; DY; CO; GA; AL; BINARY;

D O I：

10.1080/14686996.2021.1936627

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：557 / 570

页数：14

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