Current Status of Bonded Sm-Fe-N Anisotropic Magnets (invited)

• Ishikawa Takashi

  Sumitomo Metal Mining Co., Ltd.

• Kawamoto Atsushi

  Sumitomo Metal Mining Co., Ltd.

• Ohmori Kenji

  Sumitomo Metal Mining Co., Ltd.

抄録

A reduction and diffusion method (R/D) is used to make a mother alloy of Sm-Fe-N anisotropic magnets. Reduction of 0.5 wt% of samarium content compared to conventional powder increases magnetization. Milling and surface treatment improve the squareness of demagnetization curve, the aging property and the heat resistance quality. Maximum energy product of 292 kJ/m³ is obtained with the powder. High coercive force is maintainable even if the powder is exposed for 300 h in 80°C and 90 %RH. The maximum energy product of 141 kJ/m³ is obtained with an injection molded anisotropic magnet. The aging property estimated by irreversible flux loss is comparable to the conventional MQP-B magnets. The heat resistance temperature (T-5%) at which the initial irreversible flux loss becomes -5% is 125-more than 150°C for Sm-Fe-N magnets and 150-170°C for hybrid magnets.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 50 (11), 885-888, 2003

  一般社団法人 粉体粉末冶金協会

キーワード

• bonded
• Sm-Fe-N
• anisotropic
• magnet
• reduction
• diffusion
• injection

詳細情報

• CRID: 1390282681284281344
• NII論文ID: 10012549397
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.50.885
• COI: 1:CAS:528:DC%2BD3sXpslyqsbs%3D
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL書誌ID: 6787007
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6787007
• 本文言語コード: en
• 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