A Ti-Zr-Be-Fe-Cu bulk metallic glass with superior glass-forming ability and high specific strength

被引：52

作者：

Gong, P. ^{[1
]}

Wang, X. ^{[1
]}

Shao, Y. ^{[1
]}

Chen, N. ^{[1
]}

Liu, X. ^{[1
]}

Yao, K. F. ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

INTERMETALLICS | 2013年 / 43卷

基金：

中国国家自然科学基金;

关键词：

Glasses; metallic; Thermal properties; Mechanical properties at ambient temperature; Casting; MECHANICAL-PROPERTIES; AMORPHOUS-ALLOYS; LIQUID; TRANSITION; DIAMETERS;

D O I：

10.1016/j.intermet.2013.08.003

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：

It has been found that alloying with Cu element could significantly enhance the glass-forming ability (GFA) of Ti-Zr-Be-Fe alloy. As a result, a series of centimeter-scale (Ti41Zr25Be28Fe6)(100-x)Cu-x (x = 0 -20 at.%) bulk metallic glasses (BMGs) have been developed. Especially for those with x = 7-13 at.% Cu content, the critical size is larger than 20 mm. Among these Ti-based BMGs, (Ti41Zr25Be28Fe6)(91)Cu-9 (also noted as Ti37.31Zr22.75Be25.48Fe5.46Cu9) glassy alloy exhibits superior GFA with a critical size larger than 32 mm, which is the largest size of Ti-based BMGs ever reported so far. The enhancement of the GFA is suggested to arise from the Cu addition-induced decrease in both the liquidus temperature and the Gibbs energy difference between the undercooled liquid and the crystalline phases of Ti-Zr-Be-Fe alloy. In addition to its superior GFA, the lightweight (Ti41Zr25Be28Fe6)(91)Cu-9 alloy also exhibits a remarkable high specific strength of 3.7 x 10(5) N m kg(-1) and an apparent plastic strain of 1.2%. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：177 / 181

页数：5

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