Premium
Fracture of Si 3 N 4 –SiC Whisker Composites under Cyclic Loads
Author(s) -
Suresh Subra,
Han Lily X.,
Petrovic John J.
Publication year - 1988
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.1151-2916.1988.tb05041.x
Subject(s) - whisker , materials science , whiskers , composite material , fracture toughness , fracture (geology) , composite number , compressive strength , cyclic stress , volume fraction , silicon carbide , matrix (chemical analysis) , ceramic matrix composite
This communication demonstrates the role of cyclic compressive loads in inducing mode I fatigue crack growth at room temperature in Si 3 N 4 matrix–SiC whisker composite materials containing stress concentrations. The characteristics of stable, cyclic fracture are examined for several volume fractions of the SiC whisker and are compared with those of the matrix material. It is found that the composites with higher volume fractions of SiC whiskers exhibit an inferior resistance to fracture under cyclic compressive loads despite improvements in fracture toughness values.