MACROSCOPIC MODELING OF THE REACTION BONDING OF ALUMINUM-OXIDE

Citation
Sp. Gaus et al., MACROSCOPIC MODELING OF THE REACTION BONDING OF ALUMINUM-OXIDE, Journal of the European Ceramic Society, 17(8), 1997, pp. 971-975
Citations number
11
Categorie Soggetti
Material Science, Ceramics
ISSN journal
09552219
Volume
17
Issue
8
Year of publication
1997
Pages
971 - 975
Database
ISI
SICI code
0955-2219(1997)17:8<971:MMOTRB>2.0.ZU;2-2
Abstract
The reaction-bonded aluminum oxide (RBAO) process is a novel method to produce monolithic alumina-based ceramics. In order to gain some insi ght into the process, a macroscopic model, which considers the interac tion of oxygen diffusion and reaction within a porous body, has been d eveloped. The model allows one to predict, to a first approximation, t he effects of parameters, such as heat-treatment cycle, atmosphere, an d scale - an important consideration for industrial applications. Ther mogravimetric (TG) curves predicted by the model show reasonable agree ment with experimental data and indicate that the process is controlle d by a combination of reaction and diffusion. (C) 1997 Elsevier Scienc e Limited.