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Evaluation of Oxide–Oxide Composites in a Novel Combustor Wall Application
Author(s) -
Parthasarathy Triplicane A.,
Zawada Larry P.,
John Reji,
Cinibulk Michael K.,
Kerans Ronald J.,
Zelina Joseph
Publication year - 2005
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2005.02014.x
Subject(s) - materials science , composite material , finite element method , oxide , creep , ceramic matrix composite , cracking , ceramic , structural engineering , metallurgy , engineering
Oxide–oxide composites were evaluated in a novel combustor design requiring higher wall temperatures than the conventional combustors. The evaluation was based on a combination of numerical modeling and experimental rig testing. The modeling included computational fluid dynamics (CFD) calculations whose results were used in a thermo‐mechanical analysis using finite element modeling (FEM). The composites tested experimentally were obtained from a commercial vendor; they were reinforced using Nextel ™ 720 fibers. The rig tests showed that aluminosilicate matrix composites with higher room temperature strengths suffered cracking while the weaker alumina matrix composites performed satisfactorily. The results were consistent with numerical models that predicted residual stresses from creep during service. The models showed that in‐plane gradients and their effects were more severe than those of through‐thickness gradients and suggest that tailoring fiber architecture is important in transitioning these composites to applications.