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

Description:

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.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: CALPHAD, permanent magnet, phase equilibria

Date published: 2022-01-30

Publisher: Japan Society of Powder and Powder Metallurgy

Journal:

• Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy (ISSN: 05328799) vol. 69 issue. Supplement p. 52-62

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.2497/jjspm.69.S52

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Updated at: 2024-01-05 22:11:33 +0900

Published on MDR: 2023-05-15 10:27:39 +0900