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Tailorable thermal expansion in leucite‐pollucite materials derived from geopolymers for environmental barrier coatings
Author(s) -
Steveson Andrew J.,
Kriven Waltraud M.
Publication year - 2021
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.17630
Subject(s) - leucite , thermal expansion , materials science , geopolymer , thermal barrier coating , crystallization , composite material , thermal , chemical engineering , ceramic , compressive strength , thermodynamics , physics , engineering
The K[AlSi 2 O 6 ]‐Cs[AlSi 2 O 6 ] pseudo‐binary system was synthesized by geopolymer crystallization. The thermal expansion properties of these materials were studied by in situ high‐temperature X‐ray diffraction to characterize thermal expansion behavior for potential application as environmental barrier coatings. Tailorable thermal expansion through changing cation stoichiometry allowed reduced thermal expansion mismatch with SiC f /SiC composites compared to rare‐earth‐based coatings.