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Mg-Y-Cu Bulk Metallic Glass Obtained by Mechanical Alloying and Powder Consolidation

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Abstract:

Mg55Y15Cu30 metallic glass powders were prepared by the mechanical alloying of pure Mg, Y, and Cu after 10 h of milling. The thermal stability of these Mg55Y15Cu30 amorphous powders was investigated using the differential scanning calorimeter (DSC). Tg ,Tx , and Δ Tx are 442 K, 478 K, and 36 K, respectively. The as-milled Mg55Y15Cu30 powders were then consolidated by vacuum hot pressing into disk compacts with a diameter and thickness of 10 mm and 1 mm, respectively. This yielded bulk Mg55Y15Cu30 metallic glass with nanocrystalline precipitates homogeneously embedded in a highly dense glassy matrix. The pressure applied during consolidation can enhance thermal stability and prolong the existence of amorphous phase within Mg55Y15Cu30 powders.

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Periodical:

Materials Science Forum (Volumes 534-536)

Pages:

205-208

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.205

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Online since:

January 2007

Authors:

Pee Yew Lee, Chih Feng Hsu, C.C. Wang

Keywords:

Bulk Metallic Glass (BMG), Mechanical Alloying (MA), Supercooled Liquid Region, Vacuum Hot Pressing

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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DOI: 10.1063/1.372237

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