Abstract
Yb2Si2O7 is a promising candidate environmental barrier coating (EBCs) for ceramic aero-engine components. The effect of microstructure, especially porosity, on steam corrosion of Yb2Si2O7 was studied for sintered compacts of different porosities at 1350 °C. A porous layer of Yb2SiO5 formed on the surface, with the level of porosity determining corrosion rate independent of grain size. Mixed molecular/Knudsen diffusion significantly reduced effective gaseous diffusion through the pores. A thin deposit of dense Yb3Al5O12 on the surface offered protection from corrosion suggesting that microstructural control of pore formation and the inclusion of Al2O3 in Yb2Si2O7 coatings can have significant beneficial effects steam corrosion resistance of EBCs.
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.
