Optimal glass-forming composition and its correlation with eutectic reaction in the Ti-Ni-Al ternary system

被引：14

作者：

Lu, Bao-chen ^{[1
]}

Li, Yi ^{[2
]}

Xu, Jian ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117675, Singapore

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 467卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Metallic glasses; Rapid solidification; Melt spinning; Titanium; Eutectic; BULK METALLIC-GLASS; SUPERCOOLED LIQUID; AMORPHOUS-ALLOYS; MECHANICAL-PROPERTIES; CRITICAL SIZE; ZR; HF; STRENGTH; ABILITY; RANGE;

D O I：

10.1016/j.jallcom.2007.12.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The composition dependence of glass-forming ability was investigated for the Ti-Ni-Al ternary alloys. Glassy ribbons were fabricated via single-roller melt spinning. The optimal glass-forming composition was located at Ti54Ni32Al14, with a critical thickness of about 90 mu m for complete glass formation. With respect to the Ti-Ni binary alloy, Al addition in the system only marginally improves the glass-forming ability. It is attributed to a small atomic size difference between Ti and Al. For the Ti54Ni32Al14 alloy, together with the binary eutectic Ti76Ni24 and hypereutectic Ti68Ni32 alloys for comparison, phase selection in the arc-melted ingots was investigated. The optimal glass-forming composition, Ti54Ni32Al14, is near the univariant eutectic groove of [L --> Ti(Al)(2)Ni + beta-Ti(Al)] in the phase diagram. It is suggested that if the primary crystallization of the Ti2Ni intermetallic can be suppressed, solidification of deeply undercooled melt will undergo such a eutectic reaction prior to glass formation. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：261 / 267

页数：7

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