Abstract
The initial-stage oxidation behaviours of unmodified, Pt and Pt+Hf modified NiAl coating are systematically investigated by employing the photo-stimulated luminescence spectroscopy (PSLS) and transmission electron microscopy (TEM) technique. Both Pt and Hf additions can retard the θ- to α- Al2O3 phase transformation. The oxidation rates of the modified NiAl coatings are initially higher than that of the unmodified NiAl coating due to the longer presence of θ-Al2O3. However, they decrease drastically when the oxide in the scale turns to be α-Al2O3 dominantly. The delayed phase transformation in the modified coatings results in lower residual stress within the oxide scale.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.