MECHANICAL-PROPERTIES OF UNIDIRECTIONALLY ORIENTED SIC-WHISKER-REINFORCED SI3N4 FABRICATED BY EXTRUSION AND HOT-PRESSING

Authors
GOTO Y TSUGE A
Citation
Y. Goto et A. Tsuge, MECHANICAL-PROPERTIES OF UNIDIRECTIONALLY ORIENTED SIC-WHISKER-REINFORCED SI3N4 FABRICATED BY EXTRUSION AND HOT-PRESSING, Journal of the American Ceramic Society, 76(6), 1993, pp. 1420-1424
Citations number
22
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
76
Issue
6
Year of publication
1993
Pages
1420 - 1424
Database
ISI
SICI code
0002-7820(1993)76:6<1420:MOUOS>2.0.ZU;2-A
Abstract
SiC-whisker-reinforced Si3N4 was fabricated by extrusion and hot-press ing. A unidirectional alignment of the whiskers was achieved through s heet forming by extrusion. The degree of whisker orientation changed w ith the thickness of the green sheets. Unidirectionally oriented whisk ers increased fracture strength and toughness compared to samples with more randomly oriented whiskers. Anisotropy of fracture strength was observed. Bridging by whiskers impeded crack propagation when the whis ker orientation was perpendicular to the crack plane.