EFFECTS OF HEAT-TREATMENTS ON THE MICROSTRUCTURE OF A YTTRIA ALUMINA-DOPED HOT-PRESSED SI3N4 CERAMIC

Authors
BODUR CT SZABO DV KROMP K
Citation
Ct. Bodur et al., EFFECTS OF HEAT-TREATMENTS ON THE MICROSTRUCTURE OF A YTTRIA ALUMINA-DOPED HOT-PRESSED SI3N4 CERAMIC, Journal of Materials Science, 28(8), 1993, pp. 2089-2096
Citations number
18
Categorie Soggetti
Material Science
Journal title
Journal of Materials Science → ACNP
ISSN journal
00222461
Volume
28
Issue
8
Year of publication
1993
Pages
2089 - 2096
Database
ISI
SICI code
0022-2461(1993)28:8<2089:EOHOTM>2.0.ZU;2-1
Abstract
The effects of post-sintering heat treatments on the microstructure in an Y2O3-Al2O3-doped hot-pressed silicon nitride ceramic in an argon a tmosphere were studied. The degree of crystallization of the secondary crystalline phase depended more on the time than the temperature of t he heat treatments. Analytical transmission electron microscopy studie s revealed a spencite-(Y, N)-apatite solid solution as the secondary c rystalline phase, while the aluminium content in the residual glass wa s high.