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Fiber–Matrix Interfacial Characteristics in a Fiber‐Reinforced Ceramic‐Matrix Composite
Author(s) -
Singh Raj N.
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.tb06324.x
Subject(s) - materials science , composite material , composite number , silicon carbide , ceramic matrix composite , annealing (glass) , ceramic , cracking , fiber
Fiber—matrix interfacial shear stress and mechanical properties in zirconmatrix composites uniaxially re‐inforced with either uncoated or BN‐coated silicon carbide filaments were measured in the as‐fabricated state and after a thermal treatment at 1300°C for 100 h. All the tested composites showed higher fiber—matrix interfacial debond stress than frictional stress and toughened‐composite behavior. Mechanical properties of composites reinforced with uncoated filaments were unaffected by an annealing treatment at 1300°C for 100 h. In contrast, an identical annealing treatment given to a composite reinforced with BN‐coated filaments led to a decrease in first matrix cracking stress and ultimate strength. These observations were related to the changes in the measured interfacial shear stress values as a result of the annealing treatment.