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High-temperature oxidation of non-oxide ceramics

 
: Klemm, H.; Schubert, C.; Hermel, W.

Hilpert, K. ; Forschungszentrum Jülich, Institut für Werkstoffe und Verfahren der Energietechnik; International Union of Pure and Applied Chemistry -IUPAC-:
High temperature materials chemistry. Proceedings of the 10th international IUPAC conference. Vol.2 : held from 10 to 14 April 2000 at the Forschungszentrum Jülich, Germany
Jülich, 2000 (Schriften des Forschungszentrum Jülich. Reihe Energietechnik 15)
ISBN: 3-89336-277-0
S.541-544
International Union of Pure and Applied Chemistry (International Conference) <10, 2000, Jülich>
Englisch
Konferenzbeitrag
Fraunhofer IKTS ()

Abstract
The oxidation behavior of nonoxide silicon-based ceramics was investigated. Various Si3N4 and SiC ceramics were examined after long term oxidation tests (.ltoreq.10,000 h) at 1500.degree. in ambient air. The oxidation of the materials obeyed a nearly parabolic mechanism. However, different characteristic oxidation processes at the surface and the microstructure were observed dependent on the chemical components of the ceramic materials. The diffusion of oxygen into the material and its further reaction in the bulk of the material were found to be the most critical factors during long term oxidation.

: http://publica.fraunhofer.de/dokumente/B-74667.html