Abstract
Rare earth monosilicate (RE2SiO5) is one of the most promising candidates as an environmental barrier coating (EBC) for SiCf/SiC ceramic matrix composites. But single-component RE2SiO5 is hard to meet the multiple and harsh performance requirements of EBC which brings a significant challenge to their applications. Based on our previous research on single-component RE2SiO5 ceramics, (Ho0.4Yb0.3Lu0.3)2SiO5 solid solution was designed and successfully fabricated in this work. Doping of multiple RE elements endows (Ho0.4Yb0.3Lu0.3)2SiO5 with excellent thermal insulation properties and matched thermal expansion coefficient with SiCf/SiC substrates. In addition, it exhibits lower elastic modulus and comparable hardness than that of single-component RE2SiO5. (Ho0.4Yb0.3Lu0.3)2SiO5 also presents good resistance to calcium-magnesium alumino-silicates (CMAS) corrosion. Rational composition design allows (Ho0.4Yb0.3Lu0.3)2SiO5 to retain the merits of single-component RE2SiO5 while taking advantage of the solid solution effect. The results of this work suggest (Ho0.4Yb0.3Lu0.3)2SiO5 as a promising EBC candidate.
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.
