The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 550-700 °C

被引：18

作者：

Kai, Wu ^{[1
]}

Ren, I. F. ^{[1
]}

Kao, P. C. ^{[1
]}

Huang, R. T. ^{[1
]}

Liu, C. T. ^{[2
]}

机构：

[1] Natl Taiwan Ocean Univ, Inst Mat Engn, Keelung 20224, Taiwan

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

INTERMETALLICS | 2009年 / 17卷 / 04期

关键词：

Oxidation; Glasses; metallic; AMORPHOUS-ALLOYS; SYSTEM; AIR;

D O I：

10.1016/j.intermet.2008.08.013

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 oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass (Fe7-BMG) and its crystalline counterpart (XFe7) was studied over the temperature range of 550-700 degrees C in dry air. In general, the results showed that the oxidation kinetics of the Fe7-BMG and XFe7 alloys followed a parabolic-rate law, with their oxidation rates increasing with temperature. It was found that the oxidation rate constants (k(p) values) of the Fe7-BMG are slightly higher than those of XFe7, indicating that the amorphous alloy underwent a fast oxidation reaction. The scale formed on the Fe7-BMG at 550 degrees C for 48 h was thin and heterophasic mixture of iron oxides (Fe2O3/Fe3O4) and tetragonal-ZrO2 (t-ZrO2). At higher temperatures (T >= 600 degrees C), duplex scales formed on the glassy alloy consisted of an outer layer of iron oxides (Fe2O3/Fe3O4) and minor amounts of B2O3, and of a heterophasic inner layer of mostly t-ZrO2 intermixed with non-oxidized Fe3B, FeCo, and ZrB12. The formation of the crystalline intermetallics indicated the occurrence of the substrate crystallization at the temperature range of interest. (C) 2008 Published by Elsevier Ltd.

引用

页码：205 / 210

页数：6

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