Crack initiation in borosilicate glass-SiC fiber composites

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08518.x· OSTI ID:247905

Dutton, R E; Pagano, N J ^[1]; Kim, R Y ^[2]

---

1. Wright Lab., Wright-Patterson AFB, OH (United States). Materials Directorate
2. Univ. of Dayton Research Inst., OH (United States)

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{sub 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{sub 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.

• Sponsoring Organization: USDOE
• OSTI ID: 247905
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BONDING
BOROSILICATE GLASS
CARBON
COATINGS
COMPOSITE MATERIALS
CRACKS
FRACTURE PROPERTIES
INTERFACES
MATHEMATICAL MODELS
RESIDUAL STRESSES
SILICON CARBIDES
STRESSES
THERMAL EXPANSION
TITANIUM BORIDES