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Date of Publication:2018-01-01

Journal:材料工程

Affiliation of Author(s):材料科学与工程学院

Volume:46

Issue:10

Page Number:30-36

ISSN No.:1001-4381

Abstract:Fe-based metallic glass particle has an excellent application prospect in micro-forming field due to their special properties. Mono-sized Fe60Ni7.5Mo7.5P10C10B5 metallic glass particles with controllable particle diameters were prepared by pulsated orifice ejection method (POEM). The analysis of these obtained particles was carried out by optical microscope(OM), scanning electron microscope(SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC). The results show that the metallic glass particles prepared by POEM have the advantages of uniform particle diameter, high sphericity and consistent thermal history. The microstructure of particles is transformed from fully amorphous phase to crystal phase with increasing particle diameters. In the experimental conditions of this paper, the critical diameter for obtaining fully amorphous phase should be less than 285μm in Ar atmosphere. However, the particle with the maximum diameter of 383μm in He atmosphere also maintain amorphous phase. The critical cooling rate calculated by the theoretical model should be over 1300K/s. © 2018, Journal of Materials Engineering. All right reserved.

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