Soft Magnetic Bulk Glassy Fe-B-Si-Nb Alloys with High Saturation Magnetization above 1.5 T

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

• Shen Baolong

  Institute for Materials Research, Tohoku University

抄録

New Fe-based bulk glassy alloys were synthesized in the (Fe_0.75B_0.15Si_0.10)_100−xNb_x system by copper mould casting. The maximum diameter of the bulk glassy alloy rod was 0.5 mm at 1 at%Nb, 1.0 mm at 2 at%Nb and 1.5 mm at 4 at%Nb. No glass transition is observed at 0 at%Nb, but the addition of Nb causes the appearance of glass transition before crystallization. The glass transition temperature (T_g) and crystallization temperature (T_x) of the bulk glassy rods were 815 K and 858 K, respectively, for the 1 at%Nb alloy, and 835 K and 885 K, respectively, for the 4 at%Nb alloy. The reduced glass transition temperature (T_g⁄T_l) defined by the ratio of T_g to the liquidus temperature (T_l) was measured as 0.56 at 1 at%Nb, 0.57 at 2 at%Nb and 0.61 at 4 at%Nb. There is a tendency for T_g, ΔT_x (=T_x−T_g) and T_g⁄T_l to increase with increasing Nb content. The effect of Nb addition can be interpreted in the framework of the three component rules for the formation of bulk glassy alloys and the stabilization of supercooled liquid. The Fe–B–Si alloy satisfies the three component rules by the addition of Nb. The bulk glassy alloy rods exhibited good soft magnetic properties, i.e., high saturation magnetization (I_s) of 1.47 to 1.51 T, low coercive force (H_c) of 2.9 to 3.7 A/m and Curie temperature of 593 to 684 K. The high I_s and low H_c, as well as the formation of bulk glassy alloys in the simple alloy system are promising as a new type of soft magnetic bulk alloy.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (4), 766-769, 2002

  公益社団法人 日本金属学会

キーワード

• iron-based alloy
• bulk glassy alloy
• copper mould casting
• soft magnetic property
• high saturation magnetization

詳細情報

• CRID: 1390282679222356480
• NII論文ID: 10012322636
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.43.766
• COI: 1:CAS:528:DC%2BD38XksF2rt78%3D
• ISSN: 13475320
• ISSN: 13459678
• ISSN: http://id.crossref.org/issn/09161821
• NDL書誌ID: 6264050
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6264050
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/4/43_4_766/_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