Fabrication and Characterization of Mono-sized Spherical Fe-based Metallic Glass Micro-particles

doi:10.3724/SP.J.1077.2012.11582

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (8): 849-854.DOI: 10.3724/SP.J.1077.2012.11582

• Research Paper • Previous Articles Next Articles

Fabrication and Characterization of Mono-sized Spherical Fe-based Metallic Glass Micro-particles

LI Ying^1,2, DONG Wei^1,2, MIURA Ayako³, TAN Yi^1,2, KAWASAKI Akira³

(1. School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China; 2. Key Laboratory for Solar Energy Photovoltaic System of Liaoning Province, Dalian 116024; 3. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 9808579, Japan)

Received:2011-09-15 Revised:2012-01-13 Published:2012-08-20 Online:2012-07-09
About author:LI Ying. E-mail: liying8687@163.com
Supported by:
Dalian Science and Technology Foundation (2010J21DW003)

Abstract

Abstract: [(Fe_0.5Co_0.5)_0.75B_0.2Si_0.05]₉₆Nb₄ 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 changes of the critical cooling rate occur 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.

Key words: metallic glasses, microstructure, pulsated orifice ejection method (POEM), critical cooling rate

CLC Number:

LI Ying, DONG Wei, MIURA Ayako, TAN Yi, KAWASAKI Akira. Fabrication and Characterization of Mono-sized Spherical Fe-based Metallic Glass Micro-particles[J]. Journal of Inorganic Materials, 2012, 27(8): 849-854.

References

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Fabrication and Characterization of Mono-sized Spherical Fe-based Metallic Glass Micro-particles

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