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Article Dans Une Revue Scripta Materialia Année : 2009

Influence of alumina on the passive oxidation at low oxygen pressure of hot-pressed alpha-SiC

Résumé

The influence of an alumina content (2 wt.%) on the oxidation behavior of hot-pressed a-SiC is studied. Sintering of a-SiC powder with alumina rests on the formation of a liquid phase corresponding to the eutectic composition in the SiO2–Al2O3 system. The oxidation kinetics of pure a-SiC at 1470 K under helium with an oxygen partial pressure of 0.1 Pa is linear, although silica is produced. The formation of Al-rich crystallized phase could be responsible for the slower oxidation kinetics of alumina-doped SiC.

Dates et versions

hal-00398049 , version 1 (24-06-2009)

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L. Charpentier, Alexandre Maitre, M. Balat-Pichelin, Sylvie Foucaud, F. Audubert. Influence of alumina on the passive oxidation at low oxygen pressure of hot-pressed alpha-SiC. Scripta Materialia, 2009, 60, pp.481-484. ⟨10.1016/j.scriptamat.2008.11.013⟩. ⟨hal-00398049⟩
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