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Creep in Interlaminar Shear of a Nextel ™ 720/aluminosilicate Composite at 1100°C in Air and in Steam
Author(s) -
RugglesWrenn Marina,
Hilburn Skyler
Publication year - 2014
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/ijac.12357
Subject(s) - creep , materials science , mullite , composite material , composite number , aluminosilicate , microstructure , shear (geology) , oxide , ceramic , porosity , ceramic matrix composite , metallurgy , biochemistry , chemistry , catalysis
Creep in interlaminar shear of an oxide–oxide ceramic composite was evaluated at 1100°C in air and in steam. Composite consists of a porous aluminosilicate matrix reinforced with mullite/alumina (Nextel ™ 720) fibers, has no interface between fibers and matrix, and relies on the porous matrix for flaw tolerance. The interlaminar shear strength was 7.6 MPa. Creep behavior was examined for shear stresses of 2–6 MPa. Creep run‐out of 100 h was not achieved. Larger creep strains and higher creep strain rates were produced in steam. However, steam had a beneficial effect on creep lifetimes. Composite microstructure, damage, and failure mechanisms were investigated.