An investigation of the growth-mechanism of Cr2O3 on pure chromium in 1 atm oxygen at 950° C |
| |
| Authors: | M. Skeldon J. M. Calvert D. G. Lees |
| |
| Affiliation: | (1) Department of Metallurgy and Materials Science, Joint University and UMIST, Metallurgy Building, Grosvenor Street, M1 7HS Manchester, UK;(2) Department of Physics, Manchester University, M13 9PL Manchester, UK;(3) Present address: Corrosion and Protection Centre, UMIST, M60 1QD Manchester, UK |
| |
| Abstract: | The growth mechanism of Cr2O3 scale formed when pure chromium was oxidized at 950°C in oxygen at 1 atm pressure has been investigated. Isotope tracer techniques were used to determine the growth sites of the oxide. The scale was buckled extensively, with the convex side always toward the gas, never the reverse. The following growth-mechanism is proposed. Initially growth occurs entirely by cation diffusion, with new oxide being formed at the oxide-gas interface. Then, at a time that is not the same for all parts of the scale, the growth mechanism changes to one in which new oxide is formed within the outer part of the scale. |
| |
| Keywords: | Oxygen-18 diffusion Cr2O3 scales growth mechanism chromium oxidation |
| 本文献已被 SpringerLink 等数据库收录！ |
|
