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Air-oxidation of a Zr50Cu43Al7 bulk metallic glass at 400–500°C
- Source :
-
Corrosion Science . Nov2012, Vol. 64, p98-104. 7p. - Publication Year :
- 2012
-
Abstract
- 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 (k p 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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0010938X
- Volume :
- 64
- Database :
- Academic Search Index
- Journal :
- Corrosion Science
- Publication Type :
- Academic Journal
- Accession number :
- 79873583
- Full Text :
- https://doi.org/10.1016/j.corsci.2012.07.006