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Fracture Toughness of Amorphous Precursor‐Derived Ceramics in the Silicon‐Carbon‐Nitrogen System
Author(s) -
Bauer Arndt,
Christ Martin,
Zimmermann Andre,
Aldinger Fritz
Publication year - 2001
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.1151-2916.2001.tb00988.x
Subject(s) - materials science , fracture toughness , indentation , ceramic , composite material , amorphous solid , toughness , crystallography , chemistry
The toughness of amorphous precursor‐derived ceramics in the Si‐C‐N system is investigated. Crack‐growth data are obtained from DCB specimens, whereas the crack‐tip toughness is determined from the crack‐tip profile of indentation cracks. For amorphous Si‐C‐N ceramics that have been fabricated via the powder route, an R ‐curve effect is observed. The initial values of the rising R ‐curve are consistent with the estimated crack‐tip toughness.