Nanocrystallization and magnetic properties of Fe56Co7Ni7Zr2M8B 20(M=Nb or Ta) glassy alloys

H. Koshiba, A. Inoue, A. Makino

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Glassy alloys with a wide supercooled liquid region before crystallization were found in melt-spun Fe56Co7Ni7Zr2M8B 20 (M= Nb or Ta) alloys. The temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), ΔTx(=Tx-Tg) is about 60 K for these alloys. The crystallization occurs through distinct two stages. The crystallization behavior seems to reflect the existence of Fe2(M,Zr) phase resulting from the weaker bonding nature of Fe-M pair as compared with Fe-Zr pair. Good soft magnetic properties are obtained in the annealed state for 30Os at 800K below Tg for these alloys. Saturation magnetization (Is), coercive force (Hc) and effective permeability (μe) at l kHz are about 0.8T, 2A/m and 18000, respectively. The above-mentioned glassy alloys with wide supercooled liquid region and good soft magnetic properties have a strong possibility of producing soft magnetic bulk amorphous alloys.

Original languageEnglish
Pages (from-to)997-1005
Number of pages9
JournalNanostructured Materials
Volume8
Issue number8
DOIs
Publication statusPublished - 1997 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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