Oxidation Behavior of a Pd43Cu27Ni10P20 Bulk Metallic Glass and Foam in Dry Air

被引：6

作者：

Kai, W. ^{[1
]}

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

Barnard, B. ^{[2
]}

Liaw, P. K. ^{[2
]}

Demetriou, M. D. ^{[3
]}

Johnson, W. L. ^{[3
]}

机构：

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

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

[3] CALTECH, Dept Mat Sci, Keck Lab, Pasadena, CA 91125 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2010年 / 41A卷 / 07期

基金：

美国国家科学基金会;

关键词：

MECHANICAL-PROPERTIES; ALLOYS;

D O I：

10.1007/s11661-010-0231-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behavior of both Pd43Cu27Ni10P20 bulk metallic glass (Pd4-BMG) and its amorphous foam containing 45 pct porosity (Pd4-AF) was investigated over the temperature range of 343 K (70 A degrees C) to 623 K (350 A degrees C) in dry air. The results showed that virtually no oxidation occurred in the Pd4-BMG at T < 523 K (250 A degrees C), revealing the alloy's favorable oxidation resistance in this temperature range. In addition, the oxidation kinetics at T a parts per thousand yen 523 K (250 A degrees C) followed a parabolic-rate law, and the parabolic-rate constants (k (p) values) generally increased with temperature. It was found that the oxidation k (p) values of the Pd4-AF are slightly lower than those of the Pd4-BMG, indicating that the porous structure contributes to improving the overall oxidation resistance. The scale formed on the alloys was composed exclusively of CuO at T a parts per thousand yen 548 K (275 A degrees C), whose thickness gradually increased with increasing temperature. In addition, the amorphous structure remained unchanged at T a parts per thousand currency sign 548 K (275 A degrees C), while a triplex-phase structure developed after the oxidation at higher temperatures, consisting of Pd2Ni2P, Cu3P, and Pd3P.

引用

页码：1720 / 1725

页数：6

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