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Robust hydrophobicity and evaporation inertness of rare‐earth monosilicates in hot steam at very high temperature
Author(s) -
Tian Zhilin,
Zhang Jie,
Sun Luchao,
Zheng Liya,
Wang Jingyang
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16315
Subject(s) - rare earth , volatilisation , ceramic , chemical engineering , evaporation , contact angle , superheated steam , corrosion , chemistry , materials science , mineralogy , metallurgy , composite material , organic chemistry , waste management , boiler (water heating) , thermodynamics , physics , engineering
Rare‐earth oxides are intrinsically hydrophobic, and this characteristic opens new horizons for their design and diverse applications as robust hydrophobic surfaces. Here, we discover some rare‐earth (RE) monosilicates (RE 2 SiO 5 ) that are hydrophobic under ambient conditions. Their hydrophobicity is positively correlated with their hot‐steam corrosion at 1400°C. RE 3+ in RE 2 SiO 5 is further found to be a hydration prohibitor, and its species can regulate hydration and volatilization at very high temperatures. These results may provide basis for innovative designs of RE silicates in harsh hot‐steam environments for robust environmental barrier coatings (EBC) or as ceramic components.