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Effects of Fiber Volume Fraction on Mechanical Properties of SiC‐Fiber/Si 3 N 4 ‐Matrix Composites
Author(s) -
Xu Hockin H. K.,
Ostertag Claudia P.,
Braun Linda M.,
Lloyd Isabel K.
Publication year - 1994
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.1151-2916.1994.tb07068.x
Subject(s) - composite material , materials science , volume fraction , fiber , composite number , fiber pull out , matrix (chemical analysis) , volume (thermodynamics) , hot pressing , composite laminates , physics , quantum mechanics
The effects of fiber volume fraction on composite mechaniacl properties were examined in SiC‐fiber‐reinforced Si 3 N 4 composites fabricated in our laboratories. 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.