Document Type
Article
Publication Date
1-30-2004
Publication Title
Surface and Coatings Technology
Abstract
A numerical procedure for simulating the distortions exhibited by a thermally grown oxide (TGO) upon temperature cycling has been adapted to incorporate the microstructure of the bond coat. The focus is on the dual phase β/γ′ microstructure that develops upon oxidation of a system with a Pt-aluminide bond coat. The results reveal that the presence of the γ′-phase next to the TGO reduces its distortion locally, because of the superior high-temperature strength of γ′, relative to β. Conversely, in regions where the β-phase exists adjacent to the TGO, it distorts and the TGO propagates downward, while simultaneously lengthening. These results from the simulations are in direct correspondence with experimental observations.
Recommended Citation
Darzens, S., and Karlsson, A. M., 2004, "On the Microstructural Development in Platinum-Modified Nickel-Aluminide Bond Coats," Surface and Coatings Technology, 177-178pp. 108-112.
DOI
10.1016/j.surfcoat.2003.09.001
Version
Postprint
Publisher's Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Surface and Coatings Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Surface and Coatings Technology, 177, , (01-30-2004); 10.1016/j.surfcoat.2003.09.001
Volume
177
Comments
Presented at 30th International Conference on Metallurgical Coatings and Thin Films, San Diego, CA., April 28 - May 2, 2003.