Soft Magnetic Properties of Nanocystalline Fe-Si-B-Nb-Cu Rod Alloys Obtained by Crystallization of Cast Amorphous Phase

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

• Shen Baolong

  Inoue Superliquid Glass Project, ERATO, Japan Science and Technology Corporation

• Ohsuna Tetsu

  Institute for Materials Research, Tohoku University

抄録

An amorphous alloy rod of 0.5 mm in diameter was produced for an Fe_72.5Si₁₀B_12.5Nb₄Cu₁ alloy by copper mold casting, though the maximum diameter of 1.5 mm for (Fe_0.75Si_0.1B_0.15)₉₆Nb₄ alloy decreased by the addition of 1 at%Cu and the decrease in B content. The amorphous alloy rod crystallizes through multi-stage exothermic reactions. The first exothermic peak is due to the precipitation of nanoscale bcc-Fe phase and the following exothermic peaks result from the transition of bcc-Fe+amorphous→bcc-Fe+Fe₂₃B₆+Fe₂B+Fe₃Si+Fe₂Nb. The bcc-Fe phase has a particle size of about 10 nm and its volume fraction is approximately 70% after annealing for 300 s at 883 K . The alloy rod consisting of bcc-Fe and amorphous phases exhibits good soft magnetic properties, i.e., high saturated magnetic flux density of 1.21 T, low coercive force of 1.8 A/m and high initial permeability of 32000. The good soft magnetic properties for the nanocrystalline Fe_72.5Si₁₀B_12.5Nb₄Cu₁ alloy in a rod form of 0.5 mm in diameter are encouraging for future development as a new type of nanocrystalline soft magnetic bulk material.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (9), 2337-2341, 2002

  公益社団法人 日本金属学会

キーワード

• iron-based alloy
• cast amorphous alloy
• nanocrystalline alloy rod
• nanocrystallization
• soft magnetic property

詳細情報

• CRID: 1390282679224399104
• NII論文ID: 10012326454
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.43.2337
• COI: 1:CAS:528:DC%2BD38XnvFGqtr0%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 6313458
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6313458
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/9/43_9_2337/_pdf
• 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