SI3N4 SIC COMPOSITES USING CONVENTIONAL AND NANOSIZED POWDERS/

Authors
KAISER A VASSEN R STOVER D BUCHKREMER HP FORSTER J UHLENBUSCH J
Citation
A. Kaiser et al., SI3N4 SIC COMPOSITES USING CONVENTIONAL AND NANOSIZED POWDERS/, Nanostructured materials, 6(5-8), 1995, pp. 917-920
Citations number
7
Categorie Soggetti
Material Science
Journal title
Nanostructured materials → ACNP
ISSN journal
09659773
Volume
6
Issue
5-8
Year of publication
1995
Pages
917 - 920
Database
ISI
SICI code
0965-9773(1995)6:5-8<917:SSCUCA>2.0.ZU;2-O
Abstract
In the present study mixtures of conventional alpha-Si3N4 (450nm) with 5, 10, 15, 20wt% beta-SiC(500nm) or nanosized beta-SiC(20nm) and tern ary Si-C-N (15nm) powders (25, 40wt%SiC) were used as starting materia ls. Hot isostatic pressing (HIP) of these powders using quartz capsule s at temperatures above 1800 degrees C and pressures of 200MPa resulte d in compacts with densities higher than 98% theoretical density. The influence of SiC content and of the different types of starting powder s on density, phase transformation, microstructure, hardness and fract ure toughness is discussed.