Premium
Measurement of Interfacial Shear Strength in SiC‐Fiber/Si 3 N 4 Composites
Author(s) -
Laughner James W.,
Bhatt Rham T.
Publication year - 1989
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.1151-2916.1989.tb06024.x
Subject(s) - materials science , composite material , indentation , brittleness , sintering , shear strength (soil) , shear (geology) , fiber , flexural strength , environmental science , soil science , soil water
An indentation method for measuring shar strength in brittle matrix composites was applied to SiC‐fiber/Si 3 N 4 ‐matrix samples. Three methods were used to manufacture the composites: reaction bonding of a Si/SiC preform, hot‐pressing, and nitrogen‐overpressure sintering. An indentation technique developed by Marshall for thin specimens was used to measure the shear strength of the interface and the interfacial friction stresses. This was done by inverting the sample after the initial push through and retesting the pushed fibers. SEM observations showed that the shear strength was determined by the degree of reaction between the fiber and the matrix unless the fiber was pushed out of its (well‐bonded) sheath.