Soft magnetic Fe<inf>25</inf>Co<inf>25</inf>Ni<inf>25</inf>(B, Si)<inf>25</inf> high entropy bulk metallic glasses

Tianlong Qi, Yanhui Li, Akira Takeuchi, Guoqiang Xie, Haitao Miao, Wei Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

New Fe<inf>25</inf>Co<inf>25</inf>Ni<inf>25</inf>(B, Si)<inf>25</inf> high entropy bulk metallic glasses (HE-BMGs) with superior soft magnetic and mechanical properties are developed. The HE-BMGs show high glass transition temperature and wide supercooled liquid region (ΔT<inf>x</inf>). Fully glassy rods with diameters up to 1.5 mm were fabricated for the Fe<inf>25</inf>Co<inf>25</inf>Ni<inf>25</inf>(B<inf>0.7</inf>Si<inf>0.3</inf>)<inf>25</inf> alloy by copper mold casting method. The HE-BMGs exhibit high yield strength of ∼3624 MPa with large plastic strain of ∼3.1%, which is superior to the pre-developed HE-BMGs. The alloys also possess good soft magnetic properties, i.e., rather high saturation magnetization of ∼0.87 T, low coercive force of ∼1.1 A/m, and high effective permeability at 1 kHz of ∼19,800. This combination of these excellent properties gives the new HE-BMGs good promise for both scientific and engineering applications.

Original languageEnglish
Pages (from-to)8-12
Number of pages5
JournalIntermetallics
Volume66
DOIs
Publication statusPublished - 2015 Jun 26

Keywords

  • Glass forming ability
  • High-entropy alloys
  • Magnetic properties
  • Mechanical properties
  • Metallic glasses
  • Thermal properties

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Chemistry(all)

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