Bulk metallic glass formation in the Mg-Cu-Y system
Authors: Katz-Demyanetz, A.1; Rosenson, H.1; Koren, Z.1; Regev, M.2
Source: Materials Science and Technology, Volume 25, Number 10, October 2009 , pp. 1227-1233(7)
Publisher: Maney Publishing
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Abstract:
The influence of the cooling rate on 80Mg-15Cu-5Y was investigated. Four different cooling rates yielded different microstructures that were characterised by means of X-ray diffraction (XRD), SEM, high-resolution SEM, energy dispersive spectroscopy chemical analysis, TEM and high-resolution TEM. The different casting procedures were gravity castings of 3 mm diameter specimens into a copper mould held at different temperatures (cooled to −195°C with the aid of liquid nitrogen, held at room temperature and heated to 300°C) and melt spinning. Only the melt spun specimen yielded what appeared to be an amorphous XRD spectrum; however, a detailed TEM analysis showed that this specimen was characterised by a micro- or even nanocrystalline rather than amorphous structure.Keywords: MICROSTRUCTURE; GRAVITY CASTING; PERMANENT MOULD CASTING; MELT SPINNING; METALLIC GLASS
Document Type: Research article
DOI: 10.1179/174328408X374658
Affiliations: 1: Israel Institute of Metals, Foundry Laboratory, Technion-Israel Institute of Technology 2: Ort Braude College of Engineering, Mechanical Engineering Department, P.O.B. 78, Karmiel, Israel
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