金属射出成形で作製したＮｄ‐Ｆｅ‐Ｂ磁石の磁気特性

• 山下 治

  住友特殊金属(株)研究開発部

書誌事項

タイトル別名

• Magnetic Properties of Nd-Fe-B Magnets Prepared by Metal Injection Molding.
• キンゾク シャシュツ セイケイ デ サクセイシタ Nd Fe B ジシャク ノ

抄録

The Nd-Fe-B alloy powder was kneaded at 283K with the binder of methylcellulose dissolved in water. The mixture was injected at temperature 293K in a die of 353K, which is slightly above the sol-gel transformation temperature of methylcellulose. The magnetic field of 1.35 (MA/m) was applied to produce the alignment of easy magnetization direction of alloy powder in a molded body. The molded body was dehydrated by the vacuum-drying method to suppress the oxidation of alloy powder. By heating it in H₂ at 573K for 0.5H, about 80% of carbon in binder was removed, although the oxygen in binder remained unremoved. With the molded body added 2wt% methylcellulose, these treatments can allow to suppress the residual contents of oxygen and carbon in the resulted sintered Nd-Fe-B alloy within less than 9000ppm and 800ppm, respectively. The highest coercive force (iHc) and maximum energy product (BH) m ?? x for a sintered anisotropic magnet prepared by the above mentioned process are 1.10(MA/m) and 287.2(kJ/m³), respectively.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 42 (9), 1073-1078, 1995

  一般社団法人 粉体粉末冶金協会

キーワード

• metal injection molding
• methylcellulose binder
• Nd-Fe-B magnet

詳細情報

• CRID: 1390282681285683968
• NII論文ID: 10001749818
• NII論文ID: 10003380955
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.42.1073
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 3629450
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3629450
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可