http://scholars.ntou.edu.tw/handle/123456789/4474
Title: | Air-oxidation of a Zr50Cu43Al7 bulk metallic glass at 400–500 °C | Authors: | Wu Kai Lin, P. C. Chen, W. S. Chuang, C. P. Liaw, P. K. Huang, H. H. Hsieh, H. H. |
Keywords: | B. XRD;B. SEM;B. TEM;C. Oxidation | Issue Date: | Nov-2012 | Publisher: | Elsevier | Journal Volume: | 64 | Start page/Pages: | 98-104 | Source: | Corrosion Science | Abstract: | Air-oxidation behavior of a Zr50Cu43Al7 bulk metallic glass (ZCA7-BMG) was studied over the temperature range of 400–500 °C. The oxidation kinetics of the ZCA7-BMG generally followed a multiple-stage parabolic-rate law with its steady-state parabolic-rate constants (kp values) decreasing with increasing temperature, indicative of the occurrence of kinetics inversion. The scales formed on the ZCA7-BMG were strongly dependent on temperature, consisting mostly of tetragonal ZrO2 and CuO, and minor amounts of monoclinic ZrO2 and Cu2O at 400 °C, while Cu2O was completely absent at T ⩾ 450 °C. In addition, a minor amount of Al2O3 was further observed after the oxidation at 500 °C, whose formation is responsible for the lowest oxidation rate, as compared to those at T ⩽ 450 °C. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/4474 | ISSN: | 0010-938X | DOI: | 10.1016/j.corsci.2012.07.006 |
Appears in Collections: | 光電與材料科技學系 |
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