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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41485

Title: Microstructure and Mechanical Properties of Mechanically Alloyed Al2O3/ Ti-Cu-Ni-Sn Bulk Metallic Glass Composites Prepared By Vacuum Hot-Pressing
Authors: Hong-Ming Lin
Chin-Yi Chen
Chien-Yie Tsay
Chih-Feng Hsu
Pee-Yew Lee
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: Al2O3
Mechanical alloying
Bulk metallic glass composite
Supercooled liquid region
Vacuum hot-pressing
Date: 2010
Issue Date: 2017-02-21T08:04:27Z
Publisher: Journal of Alloys and Compounds
Abstract: Abstract: In the present study, Ti50Cu28Ni15Sn7 metallic glass and its composite powders reinforced with 4–12 vol.% of Al2O3 added were successfully prepared by mechanical alloying. In the ball-milled composites, an amorphous matrix with a homogeneous dispersion of Al2O3 particles was developed. The metallic glass composite powders were found to exhibit a large supercooled liquid region before crystallization. The presence of Al2O3 particles did not change the glass formation ability of the amorphous Ti50Cu28Ni15Sn7 powders. Consolidation of the as-milled Ti50Cu28Ni15Sn7 composite powders was performed at a temperature slightly higher than the glass transition temperature under a pressure of ∼1.2 GPa; using this method, the bulk metallic glass composite discs were prepared successfully. However, partial crystallization of the amorphous matrix during the hot-pressing process was noticed. The fracture strength of consolidated composite compacts was increased with Al2O3 additions. The pre-existing particle boundaries may serve as the crack initiation sites which resulted in the brittle failure of the Ti50Cu28Ni15Sn7 BMG composites.
Relation: 504(Supplement 1)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41485
Appears in Collections:[光電科學研究所] 期刊論文

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