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Crack Initiation in Borosilicate Glass‐SiC Fiber Composites
Author(s) -
Dutton Rollie E.,
Pagano Nicholas J.,
Kim Ran Y.
Publication year - 1996
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.1151-2916.1996.tb08518.x
Subject(s) - borosilicate glass , composite material , materials science , fiber , ultimate tensile strength , thermal expansion , glass fiber , residual stress , coating , volume fraction , matrix (chemical analysis) , stress (linguistics) , philosophy , linguistics
The initiation of matrix microcracking was investigated in unidirectional glass matrix composites having controlled fiber spacing. Observations were taken from composites consisting of regular arrays of TiB 2 ‐coated SIGMA 1240 and carbon‐coated SCS‐6 monofilament SiC fibers in a series of borosilicate glasses. The thermal expansion mismatch between the fibers and glass matrix was varied such that the resulting radial stresses after processing ranged from tensile to compressive. The glass strongly bonds to the TiB 2 ‐coated SIGMA 1240 fiber but weakly bonds to the carbon coating of the SCS‐6 fiber, allowing the investigation of the effects of bonding at the fiber/matrix interface. The observed crack initiation stresses of the various composites are compared to predictions based on a previously developed semiempirical model and used to study the influence of the volume fraction of fibers, residual stress state and interface strength.