Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1615889 | Journal of Alloys and Compounds | 2012 | 6 Pages |
Abstract
The oxidation behavior of a binary Cu50Zr50 bulk amorphous ribbon (CZ2-AR) was studied over the temperature range of 350-425 °C in dry air. The oxidation kinetics of the CZ2-AR generally followed a parabolic-rate law, indicating that diffusion is the rate-controlling step during oxidation. The oxidation rates of the CZ2-AR were strongly temperature-dependent, with its scaling-rate constants (ks values) increasing with temperature. Duplex scales formed on the CZ2-AR alloy were composed of an outer-layer of exclusive CuO and of a heterophasic inner-layer of CuO, monoclinic-ZrO2 (m-ZrO2) and tetragonal-ZrO2 (t-ZrO2). In addition, the CZ2-AR substrate started to form the crystalline Cu10Zr7 phase beneath the scales during the oxidation at T â¥Â 375 °C, indicative of the occurrence of the crystallization of the amorphous substrate.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
W. Kai, W.S. Chen, Y.H. Wu, P.C. Lin, C.P. Chuang, P.K. Liaw,