DEFLECTION OF A MAIN CRACK ALONG A WEAK PLANE CONSISTING OF A GROUP OF PREEXISTING CRACKS IN A SILICON-NITRIDE CERAMIC

Authors
NAKAMURA M SHIGEMATSU I MABUCHI M YAMADA Y SHIMOJIMA K SAITO N NAKANISHI M
Citation
M. Nakamura et al., DEFLECTION OF A MAIN CRACK ALONG A WEAK PLANE CONSISTING OF A GROUP OF PREEXISTING CRACKS IN A SILICON-NITRIDE CERAMIC, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 105(11), 1997, pp. 1047-1049
Citations number
4
Categorie Soggetti
Material Science, Ceramics
Journal title
Nippon Seramikkusu Kyokai gakujutsu ronbunshi → ACNP
ISSN journal
09145400
Volume
105
Issue
11
Year of publication
1997
Pages
1047 - 1049
Database
ISI
SICI code
0914-5400(1997)105:11<1047:DOAMCA>2.0.ZU;2-A
Abstract
Deflection of a main crack along an artificially formed weak plane con sisting of a group of preexisting cracks in a sillicon nitride ceramic , was studied experimentally. The weak planes inside the ceramics were formed by diffusion joining of the ceramics. Main cracks were produce d by indentation. Deflection of a main crack was related to the streng th of a joining interface. A weak joining interface could cause deflec tion of a main crack, and strengthen a specimen with an initial main c rack. A main crack passed across a strong interface and caused catastr ophic failure.