Tailorable thermal expansion in leucite-pollucite materials derived from geopolymers for environmental barrier coatings

Andrew J. Steveson, Waltraud M. Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

The K[AlSi2O6]-Cs[AlSi2O6] 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 SiCf/SiC composites compared to rare-earth-based coatings.

Original languageEnglish (US)
Pages (from-to)3397-3410
Number of pages14
JournalJournal of the American Ceramic Society
Volume104
Issue number7
DOIs
StatePublished - Jul 2021
Externally publishedYes

Keywords

  • environmental barrier coatings (EBC)
  • geopolymers
  • synthesis
  • thermal expansion

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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