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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23567

Title: Microstructure and Mechanical Properties of Vacuum Hot-Pressing SiC/ Ti-Cu-Ni-Sn Bulk Metallic Glass Composites
Authors: Hong-Ming Lin;Rong-Ruey Jeng;Pee-Yew Lee
Contributors: NTOU:Institute of Materials Engineering
Keywords: Mechanical alloying;Bulkmetallicglasscomposite;Supercooled liquid region;Vacuumhot-pressing;SiC
Date: 2008-10-15
Issue Date: 2011-10-20T08:06:38Z
Publisher: Materials Science and Engineering: A
Abstract: Abstract:In the present study, Ti50Cu28Ni15Sn7 (at.%) metallicglass and its composite powders reinforced with 4–12 vol.% of added SiC were successfully prepared by mechanical alloying. In the ball-milled composites, an amorphous matrix with a homogeneous dispersion of SiC particles was developed. The metallicglasscomposite powders were found to exhibit a large supercooled liquid region before crystallization. The presence of SiC particles did not change the glass-formation ability of the amorphous Ti50Cu28Ni15Sn7 powders. Consolidation of the as-milled Ti50Cu28Ni15Sn7composite powders was performed at a temperature slightly higher than the glass-transition temperature under a pressure of ∼1.2 GPa; using this method, the bulkmetallicglasscomposite 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 SiC 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: 493(1-2), pp.246-250
URI: http://ntour.ntou.edu.tw/handle/987654321/23567
Appears in Collections:[材料工程研究所] 期刊論文

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