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Mechanical Properties of Thin Pyrolitic Carbon Interphase SiC–Matrix Composites Reinforced with Near‐Stoichiometric SiC Fibers
Author(s) -
Katoh Yutai,
Nozawa Takashi,
Snead Lance L.
Publication year - 2005
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/j.1551-2916.2005.00546.x
Subject(s) - interphase , composite material , materials science , pyrolytic carbon , ultimate tensile strength , composite number , silicon carbide , fiber , carbon fibers , pyrolysis , chemistry , genetics , biology , organic chemistry
Tensile properties of Tyranno™‐SA near‐stoichiometric silicon carbide (SiC)‐fiber–reinforced chemically vapor‐infiltrated SiC‐matrix composites with pyrolytic carbon interphases were experimentally studied. The influence of interphase thickness in a range of 60–300 nm on the tensile properties of the materials appeared to be generally minor. Thin interphase (<100 nm) did not have a significant deteriorating effect on composite properties, which has commonly been reported for conventional SiC‐fiber composites. For very thin interphase (<60 nm) composites, a slight decrease in fracture strain and a substantial increase in interfacial sliding stress were noted. Increases in ultimate tensile strength and fracture strain were observed at a much thicker interphase (>600 nm) at the expense of composite stiffness.