Thermodynamic assessment of Fe-B-P-Cu nanocrystalline soft magnetic alloys for their crystallizations from amorphous phase

Akira Takeuchi, Akihiro Makino

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The crystallization processes of Fe83.3+xB7-xP9Cu0.7 (x = 0 to 2.5 at%) amorphous alloys were thermodynamically assessed using Thermo- Calc software with TCFE7 database for Fe-based alloys. The analysis of the alloys for a primary crystallization precipitating bcc-Fe revealed metastability among four phases comprising bcc-Fe, two kinds of Fe-based amorphous phases that are rich in Fe-B and Fe-P and crystalline Curich phase. The roles of P and Cu additions to the Fe-based amorphous alloys are thermodynamically interpreted as stabilizing the remaining amorphous phase at the primary crystallization. The dual Fe-rich amorphous phases due to the inclusion of P characterize a heterogeneous amorphous structure of NANOMET family alloys comprising Fe and metalloids mainly and without early-transition metals.

Original languageEnglish
Pages (from-to)1852-1858
Number of pages7
JournalMaterials Transactions
Volume55
Issue number12
DOIs
Publication statusPublished - 2014

Keywords

  • Amorphous alloy
  • Crystallization
  • Equilibrium phase diagram
  • Iron-boron-phosphorus-copper alloy
  • Metastability
  • Soft magnetic alloy
  • Thermodynamic calculation

ASJC Scopus subject areas

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

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