Transient Oxidation of a Nickel-Base Superalloy with Varying Oxygen Partial Pressure
The transient oxidation behaviour of a nickel-base superalloy in different oxygen partial pressures studied using electron and ion microscopy showed that at high pO2, a triple-layered oxide developed: outer nickel oxide, then a complex aluminium-chromium oxide, and inner alumina layer. Lower pO2 produced only alumina, as reduced oxygen activity suppressed nickel oxide formation. An aluminium-depleted region in the alloy with width proportional to pO2 was observed.
KeywordsNickel alloy Oxidation SIMS SEM
- 1.A. D. Cetel and D. N. Duhl, Superalloys, (The Metallurgical Society, Warrendale, 1988).Google Scholar
- 3.D. A. Ford, K. P. Fullagar, H. K. Bhangu, M. C. Thomas, P. S. Burkholder, P. S. Korinko, K. Harris and J. B. Wahl, ASME Transactions 121, 138 (1999).Google Scholar
- 7.C. Sarioglu, C. Stinner, J. R. Blachere, N. Birks, F. S. Pettit, G. H. Meier and J. L. Smialek, Superalloys 96, 71 (1996).Google Scholar
- 8.K. Harris and J. B. Wahl, Superalloys, (TMS, Warrendale, 2004), p. 45.Google Scholar
- 14.P. Kofstad, High Temperature Corrosion, (Elesvier Applied Science, London, 1988).Google Scholar