SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties

Authors
Sajgalik, P Hnatko, M Lofaj, F Hvizdos, P Dusza, J Warbichler, P Hofer, F Riedel, R Lecomte, E Hoffmann, MJ
Citation
P. Sajgalik et al., SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties, J EUR CERAM, 20(4), 2000, pp. 453-462
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
20
Issue
4
Year of publication
2000
Pages
453 - 462
Database
ISI
SICI code
0955-2219(200004)20:4<453:SN-PRA>2.0.ZU;2-K
Abstract
Two SiC/Si3N4 nano/micro composites were prepared from a starting mixture o f crystalline alpha-Si3N4, amorphous SiNC, Y2O3 and/or Al2O3. The composite material for room temperature (RT) application has high strength of 1200 M Pa, Weibull modulus of 19 and moderate fracture toughness of 7 MPa m(1/2). The composite for high temperature (HT) application, without Al2O3 has RT s trength of 710 MPa and is able to keep 60% of its RT strength up to 1300 de grees C, The creep resistance of composite material is approx. 1 order high er compared to relative monolith up to 1400 degrees C. (C) 2000 Elsevier Sc ience Ltd. All rights reserved.