Dataset Process parameters and magnetic properties (coercivity, remanence, squareness, maximum energy product) of data-driven fabrication of Nd-Fe-B anisotropic magnets by direct hot extrusion.

Lambard, Guillaume SAMURAI ORCID ; Sasaki, Taisuke SAMURAI ORCID ; Sodeyama, Keitaro SAMURAI ORCID ; Ohkubo, Tadakatsu SAMURAI ORCID ; Hono, Kazuhiro SAMURAI ORCID

DataSummary_Extrusion_Manuscript_20210728.xlsx
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Citation
Lambard, Guillaume, Sasaki, Taisuke, Sodeyama, Keitaro, Ohkubo, Tadakatsu, Hono, Kazuhiro. Process parameters and magnetic properties (coercivity, remanence, squareness, maximum energy product) of data-driven fabrication of Nd-Fe-B anisotropic magnets by direct hot extrusion.. https://doi.org/10.48505/nims.3030

Description:

(abstract)

We implemented an active learning pipeline assisted by machine learning and Bayesian optimization (ALMLBO) for predicting magnetic properties (coercivity, remanence, squareness) of Nd-Fe-B anisotropic magnets fabricated by direct hot extrusion, using a fixed commercial Nd14Fe76Co3.4B6Ga0.6 (at%) powder (MQU-F™), from their process parameters, and propose optimal processing leading to high coercivity and remanence, simultaneously. ALMLBO allowed us to optimize the process to exhibit high coercivity, 𝞵0Hc ~ 1.7 T, and remanence, 𝞵0Br ~ 1.4 T, resulting in an excellent maximum energy product, (BH)max ~ 380 kJ/m3. Therefore, the following dataset contains the process parameters (hot-press temperature and load; hot extrusion temperature, ram speed, and load limit; the identification number of the dies used at the extrusion exit) as well as the magnetic properties (coercivity, remanence, squareness, maximum energy product) of Nd-Fe-B anisotropic magnets, fabricated by direct hot extrusion, obtained before and during 3 cycles of ALMLBO.

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Keyword: Maximum energy product, Coercivity, Squareness, Machine learning, Remanence, Process, Bayesian Optimization, Hot extrusion, Active learning, Nd-Fe-B magnet

Date published: 2021-10-11

Publisher: National Institute for Materials Science

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Manuscript type: Author's original (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.3030

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Updated at: 2022-10-03 02:01:08 +0900

Published on MDR: 2021-10-13 22:30:04 +0900

Specimen / 試料

Name / 名称 : Nd-Fe-B anisotropic magnets fabricated by direct hot extrusion using a fixed commercial Nd14Fe76Co3.4B6Ga0.6 (at%) powder (MQU-F™)

Description / 試料の説明 : Nd-Fe-B anisotropic magnets fabricated by direct hot extrusion using a fixed commercial Nd14Fe76Co3.4B6Ga0.6 (at%) powder (MQU-F™)

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Name / 装置の名称 : B-H tracer

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Description / 装置の説明 : Tamakawa Co., Ltd, TM-BH25-C1

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Name / 装置の名称 : Carl Zeiss Crossbeam 1540 EsB FIB/SEM

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Description / 装置の説明 : Carl Zeiss Crossbeam 1540 EsB FIB/SEM

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