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

Andrew J. Steveson; Waltraud M. Kriven

doi:10.1111/jace.17630

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

Research output: Contribution to journal › Article › peer-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 SiC_f/SiC composites compared to rare-earth-based coatings.

Original language	English (US)
Pages (from-to)	3397-3410
Number of pages	14
Journal	Journal of the American Ceramic Society
Volume	104
Issue number	7
DOIs	https://doi.org/10.1111/jace.17630
State	Published - Jul 2021

Keywords

environmental barrier coatings (EBC)
geopolymers
synthesis
thermal expansion

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Online availability

10.1111/jace.17630

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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.",

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author = "Steveson, {Andrew J.} and Kriven, {Waltraud M.}",

note = "Funding Information: The authors also gratefully acknowledge funding from the AFOSR under Grant number F9550‐15‐1‐0107. Funding Information: Use of the Advanced Photon Source was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE‐AC02‐06CH11357. Publisher Copyright: {\textcopyright} 2020 The American Ceramic Society",

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KW - thermal expansion

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

Abstract

Keywords

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