SINTERABILITY AND FRACTURE-TOUGHNESS OF B ETA-SI3N4 WHISKER-ADDED SILICON-NITRIDE

Authors
ANDOU M SAWAOKA A
Citation
M. Andou et A. Sawaoka, SINTERABILITY AND FRACTURE-TOUGHNESS OF B ETA-SI3N4 WHISKER-ADDED SILICON-NITRIDE, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 102(9), 1994, pp. 890-892
Citations number
4
Categorie Soggetti
Material Science, Ceramics
Journal title
Nippon Seramikkusu Kyokai gakujutsu ronbunshi → ACNP
ISSN journal
09145400
Volume
102
Issue
9
Year of publication
1994
Pages
890 - 892
Database
ISI
SICI code
0914-5400(1994)102:9<890:SAFOBE>2.0.ZU;2-5
Abstract
Silicon nitride powders containing 5 mass% Y2O3 and 5 mass% MgAl2O4 as sintering additives were sintered with beta-Si3N4 whisker of 0-90 mas s% at 1800-degrees-C for 1-3h at 0.1-1 MPa of N2 atmosphere. The silic on nitride with 0-15 mass% beta-Si3N4 whisker was densified above 90% of theoretical density in the above conditions. Rod-like beta-Si3N4 gr ains grew on seeded-beta-Si3N4 whisker. The fracture toughness of Si3N 4 with 15 mass% beta-Si3N4 whisker was 35% higher than that of monolit hic Si3N4.