Effect of Co concentration on thermal stability and magnetic properties of (Fe,Co)-Nb-Gd-B glassy alloys

Fei Jia, Wei Zhang, Xingguo Zhang, Guoqiang Xie, Hisamichi Kimura, Akihiro Makino, Akihisa Inoue

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13 Citations (Scopus)


A two-stage-like glass transition phenomenon attenuated gradually with an increase in Co content in (Fe1-yCoy)67.5Nb 4Gd3.5B25 (y = 0.1-0.5) glassy alloys, and disappeared for the alloy with y = 0.5, resulting in a large supercooled liquid region of 102 K. As the Co content increases, the liquidus temperature decreases gradually, and the reduced glass transition temperature increases, indicating the enhancement of glass-forming ability (GFA). The best GFA was obtained for alloy with y = 0.5, and the full glassy sample with a diameter of 5 mm could be fabricated by copper mold casting. The (Fe,Co)-Nb-Gd-B glassy alloys exhibited good soft magnetic properties, i.e., rather high saturation magnetization of 0.86-0.91 T, low coercive force below 5.0 A/m, and low saturated magnetostriction of 6-13 × 10-6. In addition, the glassy alloys also possessed very high compressive fracture strength of 3821-4112 MPa and high Vickers hardness of 1028-1065.

Original languageEnglish
Pages (from-to)S129-S131
JournalJournal of Alloys and Compounds
Issue numberSUPPL. 1
Publication statusPublished - 2010 Aug 1


  • Fe-based alloy
  • Glass transition
  • Glass-forming ability
  • Magnetic property
  • Metallic glass

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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