Effects of fiber volume fraction on mechanical properties of SiC-fiber/Si[sub 3]N[sub 4]-matrix composites

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb07068.x· OSTI ID:6981810

Xu, H H.K.; Ostertag, C P; Braun, L M ^[1]; Lloyd, I K ^[2]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)
2. Univ. of Maryland, College Park, MD (United States). Dept. of Materials and Nuclear Engineering

The effects of fiber volume fraction on composite mechanical properties were examined in SiC-fiber-reinforced Si[sub 3]N[sub 4] composites. Fiber volume fraction was found to have significant effects on important composite properties including failure mode, ultimate strength, matrix-cracking stress, fiber-matrix interfacial shear stress, and work-of-fracture. The composite mechanical properties were improved with increasing fiber volume fraction. However, when the fiber volume fraction was sufficiently large, the composite ultimate strength was degraded. This was related to fiber strength loss as a result of fiber damage from contact with surrounding fibers and abrasive matrix particles during hot pressing.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6981810
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:7; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
TENSILE PROPERTIES