磁性材料の化学　Ｓｍ‐Ｃｏ系焼結磁石の磁気特性に及ぼす残留炭素の影響

• 森本 耕一郎

  三菱マテリアル(株)総合研究所材料技術研究所

• 八幡 誠朗

  知財サービス(株)

• 永井 宏

  大阪大学工学部材料物性工学科

書誌事項

タイトル別名

• Influence of Residual Carbon on Magnetic Properties of Sintered Sm-Co Magnets.
• Sm Coケイ ショウケツ ジシャク ノ ジキ トクセイ ニ オヨボス ザンリ

抄録

The addition of organic binder in a small amount improves the compressibility and compactibility of Sm-Co magnet alloy powders. However, impurity carbon which comes from the binder is thought to lower magnetic properties of the sintered magnets. In this study, the relationships between the resid-ual carbon content and magnetic properties in SmCo₅ and Zr containing Sm₂ Co₁₇ magnets have been studied varying the amount of the binder. Effects of thermal debinding atmosphere on binder removal have been also investigated. When the green compacts were debound in vacuum atmosphere, the carbon content of the magnets increased with increase of the binder addition, which decreased coercivities of the magnets markedly. It was observed that carbon forms SmCoC₂ and ZrC carbides in SmCo₅ and Sm₂Co₁₇ magnets respectively. Thermal debinding treatment in hydrogen atmosphere was found to be very effective for removing the binder and reducing the carbon content in the mag-nets. In the binder addition ranges of the present study, the magnets produced through use of this debinding treatment have exhibited nearly the same magnetic properties as those of the magnets made from the powders without the binder.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 43 (1), 66-71, 1996

  一般社団法人 粉体粉末冶金協会

キーワード

• Sm-Co magnet
• carbon
• debinding
• coercivity
• hydrogen atmosphere

詳細情報

• CRID: 1390282681285503232
• NII論文ID: 10002011091
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.43.66
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 3918036
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3918036
• 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