Phase stability and microstructure of MgAl2O4/SiC composites sintered in argon atmosphere

Authors
Mazzoni, AD Conconi, MS Aglietti, EF
Citation
Ad. Mazzoni et al., Phase stability and microstructure of MgAl2O4/SiC composites sintered in argon atmosphere, CERAM INT, 26(2), 2000, pp. 147-151
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
CERAMICS INTERNATIONAL
ISSN journal
02728842 → ACNP
Volume
26
Issue
2
Year of publication
2000
Pages
147 - 151
Database
ISI
SICI code
0272-8842(2000)26:2<147:PSAMOM>2.0.ZU;2-M
Abstract
The phase stability of MgAl2O4-SiC composites was studied under low oxygen pressures. Mixtures of spinel and silicon caribide were isostatically press ed and then treated at 1550 and 1650 degrees C in argon atmospheres. Sinter ed samples were analyzed using XRD, pycnometry, EDAX and SEM. A second alum ina-rich spinel appeared due to surface reactions of spinel and SiC grains. This was accompanied by a weight loss of samples due to Mg volatilization. Sintered composites did not reach high densities. (C) 2000 Elsevier Scienc e Ltd and Techna S.r.l. All rights reserved.