Fracture Behavior of a Silicon Nitride Ceramic under Mixed-Mode Fracture Condition

Fracture Behavior of a Silicon Nitride Ceramic under Mixed-Mode Fracture Condition

The mixed-mode fracture toughness of a silicon nitride ceramic was studied to evaluate the parameter C in Shetty's empirical equation. The measurement was conducted at room temperature and 800°C by the four-point bending method using the controlled surface flaw technique. The obtained Shetty�...

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Veröffentlicht in:Journal of the Ceramic Society of Japan 1993/02/01, Vol.101(1170), pp.240-243
Hauptverfasser: ONO, Takashi, TAKENOSHITA, Takeshi, UCHIMURA, Hiroshi, KAJI, Masaki
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Knoop indentation flaw
Mixed-mode fracture
Shetty's empirical equation
Silicon nitride
Stress intensity factor
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Zusammenfassung:The mixed-mode fracture toughness of a silicon nitride ceramic was studied to evaluate the parameter C in Shetty's empirical equation. The measurement was conducted at room temperature and 800°C by the four-point bending method using the controlled surface flaw technique. The obtained Shetty's parameter C was 1.58 at room temperature and 1.35 at 800°C. These values are in good agreement with those obtained by multiaxial strength tests.
ISSN:0914-5400
1882-1022
DOI:10.2109/jcersj.101.240