Effect of oxygen on the thermal stability of Zr-Cu-Ni-Al-Ti bulk amorphous alloy

被引：0

作者：

He, L ^{[1
]}

Sun, J ^{[1
]}

机构：

[1] Xian Jiaotong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2006年 / 42卷 / 02期

关键词：

Zr-based bulk amorphous alloy; oxygen impurity; glass forming ability; thermal stability; crystallization kinetics;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Crystal Zr bar and sponge Zr were employed as raw materials to prepare wedge-like specimens of Zr52.5Cu17.9Ni14.6Al10Ti5 bulk amorphous alloy with different oxygen impurity contents by a tilt casting method using ladle hearth type arc furnace. Effects of oxygen impurity on the alloy's glass forming ability and thermal stability were investigated. It is shown that the glass forming ability of the quinary alloy characterized by maximum amorphous sample forming thickness t(max) was decreased as oxygen impurity content increased, on the contrary, its thermal stability characterized by supercooled liquid region Delta T-x1 was enhanced. Oxygen impurity has the tendency to heighten the apparent activation energy E-ax1 for the crystallization process onset of the amorphous alloy, which made the crystallization incubation period of the alloy under larger supercooled state lengthened and thereby the thermal stability enhanced.

引用

页码：134 / 138

页数：5

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