Excellent thermal stability and bulk glass forming ability of Fe-B-Nb-Y soft magnetic metallic glass

Sangmin Lee, Hidemi Kato, Takeshi Kubota, Kunio Yubuta, Akihiro Makino, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


Effects of Y addition on the glass forming ability (GFA) of a Fe-B-Nb marginal glass former, and annealing effects on glassy/supercooled liquid phases as well as soft magnetic properties in the multicomponent Fe-B-Nb-Y alloy system were investigated. The origin of highly improved GFA in the multicomponent system is discussed with related to a characteristic exothermic phase transformation, chemical short range ordering, in the supercooled liquid region due to the positive heat of mixing between Nb-Y elements. The separating tendency between Nb and Y elements is considered to suppress precipitation of metastable Fe23B6 and α-Fe crystalline phases, thus to result in highly improving GFA and distinct high thermal stability against heat treatment of the alloy system. In addition, a glassy ring was fabricated by copper mold casting and magnetic properties were investigated before/after heat treatment.

Original languageEnglish
Pages (from-to)506-512
Number of pages7
JournalMaterials Transactions
Issue number3
Publication statusPublished - 2008 Mar


  • Excellent soft magnetic properties
  • High thermal stability
  • Iron-based alloy
  • Metallic glasses

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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