Abstract
Progressive roughening (rumpling) of the surface of platinum-modified nickel aluminide bond coats during cyclic oxidation at 1150 °C is studied. A series of microstructural observations and quantitative results, for different experimental conditions, are used to describe the surface evolution of the bond coats and a bulk aluminide alloy of similar composition. Possible rumpling mechanisms, discussed in the literature, are examined and compared to the actual characteristics of the observed rumpling. The effects of various factors, specifically oxidation conditions, cycle length, surface roughness, thermal expansion mismatch, and phase transformation in the bond coat are explored and briefly discussed. Analysis of the experimental data suggests that the underlying mechanism of surface rumpling of the aluminide bond coats still remains to be established.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
