Effects of cooling rates and container walls in preparation of spherical fe and pd based metallic glassy particles

Rui Yamada, Noriharu Yodoshi, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Preparation of Fe-based and Pd-based metallic glassy particles with a diameter of around 500 μm were investigated. Firstly, we measured the critical cooling rate of Pd42.5Cu30Ni7.5P 420 metallic glass and our results showed that its critical cooling rate was about 0.4 K/s. Pd-based metallic glassy spherical particles with fully amorphous structure were successfully prepared by heating th 2 samples on the Al2O3 substrate up to their melting points and cooling under the cooling rate of around 3 K/s. In contrast, [(Fe0.5Co 0.5)7.5Si0.05B0.2] 96Nb4 metallic glassy particles cannot be prepared by the same process. This seemed to be caused by a re iction between the Fe-based metallic glass and the Al2O3 substrate around its melting point. This result suggested that conta nerless solidification method is expected to be used to prepare Fe-based metallic glassy particles. We successfully prepared m >no-sized spherical particles of [(Fe 0.5Co0.5)0.75Si0.05B 0.2]96Nb4 metallic glass by Pulsated Orifice Ejection Method (POEM) as ar ideal process for Fe-based metallic glasses.

Original languageEnglish
Pages (from-to)139-146
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume77
Issue number4
DOIs
Publication statusPublished - 2013 Apr 1

Keywords

  • Cooling rate
  • Iron-based metallic glass
  • Palladium-based metallic glass
  • Pulsated Orifice Ejection Method
  • Spherical particles

ASJC Scopus subject areas

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

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