Synthesis of resource saving Fe-based semi-hard magnetic material by controlling of nano-crystal structure

• Project/Area Number: 25600037
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials engineering
• Research Institution: Tohoku University
• Principal Investigator: MAKINO Akihiro 東北大学, 金属材料研究所, 教授 (30315642)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 金属物性 / 半硬質磁性 / 組織制御 / 粒成長

Outline of Final Research Achievements

Development and magnetic properties of an alloy that can change from very soft to semi-hard magnetic are reported. We found that as quenched ribbons of Fe75.3Pt8B12P4Cu0.7 alloy are amorphous by X-ray. Heat treatment in the temperature range of 400-450 ℃ causes formation of many a-Fe grains in the amorphous matrix. Hard magnetic L10 FePt grains appear at 520 ℃. This alloy shows a high saturation magnetic flux density [Bs >1.55 T] along with the ability to vary coercivity (Hc) from 25 A/m to 11000 A/m. The ability to control magnetic properties lies in a precise control over the soft and hard magnetic phases, which are strongly exchange coupled.

Research Products

• [Journal Article] Production of a magnetic material with the ability to change from very soft to semi-hard magnetic (2015)
  • Author(s): Zhang Y., Sharma P., Yodoshi N., Makino A.
  • Journal Title: Journal of Applied Physics Volume: 117 Issue: 17
  • DOI: 10.1063/1.4916812
  • Peer Reviewed
• [Journal Article] Effect of P Addition on the Structure and Magnetic Properties of Melt-Spun Fe-Pt-B Alloy (2014)
  • Author(s): W. Zhang, A. Kazahari, K. Yubuta, A. Makino, Y.M. Wang, R. Umetsu and Y.H. Li
  • Journal Title: Journal of Alloys and Compounds Volume: 586 Pages: S294-S297
  • DOI: 10.1016/j.jallcom.2012.11.176
  • Peer Reviewed
• [Journal Article] Electrochemical Behavior of Annealed Soft-Magnetic Fe–Si–B–P–Cu Alloy (2013)
  • Author(s): Z.H. Dan, Y. Yamada, Y. Zhang, M. Nishijima, N. Hara, H. Matsumoto and A. Makino
  • Journal Title: MATERIALS TRANSACTIONS Volume: 54 Issue: 4 Pages: 561-565
  • DOI: 10.2320/matertrans.MBW201213
  • NAID: 10031162825
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Magnetic properties and structure of Fe83.3-85.8B7.0-4.5P9Cu0.7 nanocrystalline alloys (2013)
  • Author(s): A. Urata, M. Yamaki, K. Satake, H. Matsumoto and A. Makino
  • Journal Title: Journal of Applied Physics Volume: 113 Issue: 17 Pages: 62118-62118
  • DOI: 10.1063/1.4794377
  • Peer Reviewed
• [Journal Article] 2013 (2013)
  • Author(s): P. Sharma, N. Kaushik, M. Esashi, M. Nishijima and A. Makino
  • Journal Title: Journal of Magnetism and Magnetic Materials Volume: Vol.38 Pages: 337-338
  • DOI: 10.1016/j.jmmm.2013.02.029
  • Peer Reviewed
• [Presentation] FePtBPCu系α-Fe/L10FePtナノコンポジット半硬磁性材料の創製 (2015)
  • Author(s): 張 岩
  • Organizer: 公益社団法人日本金属学会第156回春期講演大会
  • Place of Presentation: 東京大学
  • Year and Date: 2015-03-19
• [Presentation] Fe-rich FeSiBPCu Nano-crystalline Soft Magnetic Alloys Contributable To Energy-saving (2014)
  • Author(s): Akihiro Makino
  • Organizer: TMS2014
  • Place of Presentation: San Diego Marriott Marquis & Marina（アメリカ合衆国、サンディエゴ）
• [Presentation] High Bs-FeSiBPCu Nanocrystalline Soft Magnetic Alloys Contributable to Energy-saving (2013)
  • Author(s): Akihiro Makino
  • Organizer: PRICM-8（基調講演）
  • Place of Presentation: Hilton Waikoloa Village（アメリカ合衆国、ハワイ）
• [Presentation] New Nano-Crystalline Soft Magnetic Materials "NANOMET(TM)" for Energy Saving (2013)
  • Author(s): Akihiro Makino
  • Organizer: 第37回日本磁気学会学術講演会
  • Place of Presentation: 北海道大学（札幌）
  • Invited
• [Presentation] ナノ結晶センターの研究開発状況 ～ナノ構造制御による金属材料の高機能化～ (2013)
  • Author(s): 牧野彰宏
  • Organizer: 第125回金属材料研究所講演会（2013年春季）
  • Place of Presentation: 金属材料研究所2号館講堂（仙台）
• [Patent(Industrial Property Rights)] αＦｅナノ結晶分散アモルファス溶射被膜の製造方法 (2013)
  • Inventor(s): 清水 雄太、村田 晃徒、中島 浩二、石川 智仁、牧野 彰宏
  • Industrial Property Rights Holder: トピー工業株式会社、東北大学
  • Industrial Property Rights Type: 特許
  • Filing Date: 2013-04-18
  • Acquisition Date: 2013-10-25