Abstract
The effect of Co vs. Fe content on early stages of oxidation in air was studied in Co-Cr-Fe-Mn-Ni-Si complex concentrated alloys (CCAs). A higher Co content decreased the phase fraction of protective corundum-type oxide as determined quantitatively. This is consistent with presented thermodynamic calculations, predicting a decrease in Cr activity with increasing Co content. The formation of Cr-rich corundum-type oxide is hindered in favor of Fe/Co/Ni-rich spinel-type oxide. Accordingly, beneficial effects of Co on mechanical properties of 3d transition metal CCAs for high temperature applications need to be balanced with detrimental effects on oxidation resistance.
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.