A new Ti-Zr-Hf-Cu-Ni-Si-Sn bulk amorphous alloy with high glass-forming ability

被引：79

作者：

Huang, Y. J.

Shen, J. ^{[1
]}

Sun, J. F.

Yu, X. B.

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Lab Energy Sci & Technol, Shanghai 200050, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 427卷 / 1-2期

关键词：

bulk amorphous alloy; glass-forming ability; thermal stability; titanium alloy;

D O I：

10.1016/j.jallcom.2006.03.006

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 effect of Sn substitution for Cu on the glass-forming ability was investigated in Ti41.5Zr2.5Hf5Cu42.5-xNi7.5SilSnx (x=0, 1, 3, 5, 7) alloys by using differential scanning calorimetry (DSC) and X-ray diffractometry. The alloy containing 5% Sn shows the highest glass-forming ability (GFA) among the Ti-Zr-Hf-Cu-Ni-Si-Sn system. Fully amorphous rod sample with diameters up to 6 mm could be successfully fabricated by the copper mold casting Ti41.5Zr2.5Hf5CU37.5Ni7.5Si1Sn5 alloy. The activation energies for glass transition and crystallization for Ti41.5Zr2.5Hf5CU37.5Ni7.5Si1Sn5 amorphous alloy are both larger than those values for the Sn-ftee alloy. The enhancement in GFA and thermal stability after the partial replacement of Cu by Sn may be contributed to the strong atomic bonding nature between Ti and Sn and the increasing of atomic packing density. The amorphous Ti41.5Zr2.5Hf5Cu37.5Ni7.5Si1Sn5 alloy also possesses superior mechanical properties. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：171 / 175

页数：5

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