Fabrication and characterization of mono-sized spherical Fe-based metallic glass micro-particles

Ying Li, Wei Dong, Ayako Miura, Yi Tan, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

[(Fe 0.5Co 0.5) 0.75B 0.2 Si 0.05] 96Nb 4 metallic glass alloy particles with narrow size distribution and high sphericity were prepared in a Helium atmosphere by pulsated orifice ejection method (POEM). The analysis of these obtained particles was carried out by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and transmission electron microscope (TEM). The results show that the phase transitions of particles from the mixed phase consisting of the glassy phase and the crystalline phase to the fully glassy phase occur as the particle diameter is decreased. The particles obtained in the fully glassy phase have a diameter of less than 645 μm. The critical cooling rate for fully glassy phase is estimated to be in the range of 800-1100 K/s. No change of the critical cooling rate occurs in Ar or He atmosphere. Critical cooling rate measured in this method is definitely lower than that measured by time-temperature transformation diagram of bulk metallic alloy.

Original languageEnglish
Pages (from-to)849-854
Number of pages6
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Volume27
Issue number8
DOIs
Publication statusPublished - 2012 Aug 1

Keywords

  • Critical cooling rate
  • Metallic glasses
  • Microstructure
  • Pulsated orifice ejection method (POEM)

ASJC Scopus subject areas

  • Materials Science(all)
  • Inorganic Chemistry

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