Critical cooling rates of mono-Sized Fe-Based Glassy Particles in [(Fe xCo1-x)o.75B0.2Si0.05] 96Nb4 System

Masahiro Fukue, Noriharu Yodoshi, Rui Yamada, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Fe based metallic glassy alloys are prospective material for micro parts due to their excellent mechanical properties. In this study we successfully prepared two kinds of [(FexCo1-x)o.75B 0.2Si0.05]96Nb4 (X=0.5 and 0.8) alloy mono-sized spherical particles with various sizes as a raw material for the micro parts by using originally developed process named Pulsated Orifice Ejection Method. Each alloy exhibits different critical diameter for maintaining a glassy phase due to the different glass forming ability. We estimated the critical cooling rates of X= 0.5 and 0.8 alloys to be 1000 K/s and 4000 K/s, respectively from calculation of cooling process during the free fall of the molten alloy droplets in cooling gas. Oxygen contamination amounts of the obtained particles are also investigated for the comparison between the conventional casting process and our new process.

Original languageEnglish
Pages (from-to)573-578
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number10
Publication statusPublished - 2012 Oct


  • Critical cooling rate
  • Iron-based metallic glass
  • Mono-sized particles

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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