Elucidation of the anisotropic mechanism in HDDR magnet powders based on ultramicroscopic analysis

KAKEN

About This Project

Japan Grant Number
JP25K08257 (JGN)
Funding Program
Grants-in-Aid for Scientific Research
Funding Organization
Japan Society for the Promotion of Science

Kakenhi Information

Project/Area Number
25K08257
Research Category
Grant-in-Aid for Scientific Research (C)
Allocation Type
  • Multi-year Fund
Review Section / Research Field
  • Basic Section 26010:Metallic material properties-related
Research Institution
  • Kyushu University
Project Period (FY)
2025-04-01 〜 2028-03-31
Project Status
Granted
Budget Amount*help
4,550,000 Yen (Direct Cost: 3,500,000 Yen Indirect Cost: 1,050,000 Yen)

Research Abstract

水素中で熱処理するだけで高性能な異方性磁石粉末が得られる水素化・相分解・脱水素・再結合（ＨＤＤＲ）処理における微細粒配向メカニズムの全容解明を目指す。残留磁化（結晶配向度）が大きく異なる磁石粉末が得られるＨＤＤＲ処理途中のＮｄ－Ｆｅ－Ｂ系粉末試料を種々用意し、歳差電子回折（ＰＥＤ)法など走査透過電子顕微鏡(ＳＴＥＭ)を主軸とした超顕微解析を行う。変態初期のナノ組織から従来にない高精度データを広範囲で取得して、方位マッピング像から構成相間の結晶方位関係を確定し、正方晶→立方晶→正方晶へのバリアント選択機構を解明していく。

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