ROOM-TEMPERATURE CYCLIC FATIGUE OF REACTION-BONDED SILICON-NITRIDE USING THE DOUBLE CLEAVAGE DRILLED COMPRESSION SPECIMEN

Authors
CHRISTENSEN RJ FABER KT
Citation
Rj. Christensen et Kt. Faber, ROOM-TEMPERATURE CYCLIC FATIGUE OF REACTION-BONDED SILICON-NITRIDE USING THE DOUBLE CLEAVAGE DRILLED COMPRESSION SPECIMEN, Journal of the American Ceramic Society, 79(2), 1996, pp. 425-429
Citations number
30
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
79
Issue
2
Year of publication
1996
Pages
425 - 429
Database
ISI
SICI code
0002-7820(1996)79:2<425:RCFORS>2.0.ZU;2-V
Abstract
The double cleavage drilled compression specimen was used to study the room-temperature cyclic fatigue behavior of reaction-bonded silicon n itride (RBSN). Fatigue results were compared with slow crack growth un der static loading. The fatigue exponent for RBSN was found to be 40, although no slow crack growth occurred under static loading. The fatig ue threshold for RBSN was as low as 0.5K(1c) and dependent upon loadin g conditions. Crack growth behavior and electron microscopy provided e vidence that the fatigue mechanism was due to asperity and debris wedg ing at the crack face.