Abstract
The hot corrosion behaviour of Yb2Si2O7 environmental barrier coatings in molten salt NaVO3 was studied at 1000 °C-1300 °C. Results showed that YbVO4 and Yb2SiO5 were the main corrosion products, with rod-like and granular morphologies, respectively. The content of corrosion products was dependent on the corrosion temperatures. The content of YbVO4 decreased at 1000 °C-1200 °C and disappeared at 1300 °C. However, the content of Yb2SiO5 increased at 1100 °C-1300 °C and Yb2SiO5 was the main corrosion product at 1300 °C. The amorphous phase in the Yb2Si2O7 coating had a remarkable effect on the corrosion results. After heat treatment was conducted at 1400 °C for 12 h, the amorphous phase crystallised and then YbVO4 was the main corrosion product at 1300 °C. A model describing the formation of corrosion products was established on the basis of the corrosion products and the corrosion mechanism was discussed.
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.
