High-entropy Rare Earth Silicates
for Multifunctional Thermal and Environmental Barrier Coating Materials
Jingyang
Wang*
Advanced Ceramics and Composites Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
ABSTRACT:
Rare
earth (RE) silicates are candidates of multifunctional thermal and
environmental barrier coating (TEBC) for SiCf/SiC CMCs against high
temperature corrosions in aviation engines. Current challenges address to the
balance of the critical mechanical, thermal and chemical properties of
silicates containing single or simple RE species. High entropy or
multicomponent design of REs may stimulate new breakthroughs on property
modifications for harsh engine environments. This lecture shows our recently
progresses on the advancement of outstanding phase stability, tailoring of
thermal expansion, and enhancement of CMAS corrosion resistances of high
entropy rare earth silicates. The present works provide new perspective on the
design of TEBC materials through engineering of complex multicomponent rare
earth silicates.
Keywords: high-entropy;
rare earth silicate; multifunctional thermal and environmental barrier coating.
Dr. Jingyang Wang is the Distinguished Professor of Chinese Academy of Sciences (CAS) and division head of the Advanced Ceramics and Composites Division at the Shenyang National Laboratory for Materials Science and the Institute of Metal Research (IMR), CAS, China. His research fields are focused on fundamental understanding and technological developments of ceramics and composites for extreme environment applications. He has authored over 240 journal papers (WoS H-index factor 46), holds 22 registered patents, and has delivered more than 70 plenary/keynote/invited lectures in international conferences. He received many prestigious recognitions and awards, including Academician of Word Academy of Ceramics (WAC), Fellow of The American Ceramic Society (ACerS), Fellow of ASM International, Acta Materialia Silver Medal Award, and National Leading Talent for Science and Technology Innovation (Ten Thousand Talent Program of China). He serves as a Board of Director of ACerS (2018-2021), President of WAC Forum Committee, and Member of International Advisory Board of the European Ceramic Society. He is currently the Deputy Editor-in-Chief of J. Inorganic Mater. and Executive Editor of JMST.