Abstract
The performance of 50HfO2-50SiO2/YxYb(2−x)Si2O7 thermal environmental barrier coating prepared using atmospheric plasma spraying was investigated in the Al2O3 tube furnace in 90%H2O-10%O2 conditions at 1475 °C. The results showed that YxYb(2−x)Si2O7 layer was contaminated by alumina impurities during the testing process. The thermally grown oxide layer was formed at the bond coat/SiC interface, it grew as the cycles increased. Furthermore, the (Y/Yb)2O3-HfO2 solid solution with a higher coefficient of thermal expansion was formed at YxYb(2−x)Si2O7/50HfO2-50SiO2 interface. The horizontal cracks were the principal factor that caused the failure of 50HfO2-50SiO2/YxYb(2−x)Si2O7. 50HfO2-50SiO2/YxYb(2−x)Si2O7 protected SiC for 25 cycles in steam conditions.
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.
