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Article Dans Une Revue High Temperatures-High Pressures Année : 2015

Kinetic and metallographic study of the oxidation at high temperature of a cast Ni 25Cr alloy in water vapour-rich air

Résumé

The high temperature oxidation behaviour of a Ni 25 wt.% Cr alloy in air enriched with water vapour (180 mbars H 2 O) was studied at 1000, 1100, 1200 and 1300 °C. The oxidized samples were characterized by X-Ray diffraction, electron microscopy and wavelength dispersion spectroscopy. The obtained data were compared to the ones earlier obtained for the same alloy oxidized in dry air. Water vapour globally induced at all temperatures a decrease of the parabolic constant Kp and an increase of the chromia volatilization constant Kv. The oxide scales do not present morphologic difference between the two atmospheres. After oxidation in humidified air the scale thickness is thinner and the Cr-depleted depth is lower than in dry air.
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hal-02878401 , version 1 (23-06-2020)

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Lionel Aranda, Thierry Schweitzer, Ludovic Mouton, Sandrine Mathieu, Olivier Rouer, et al.. Kinetic and metallographic study of the oxidation at high temperature of a cast Ni 25Cr alloy in water vapour-rich air. High Temperatures-High Pressures, 2015, 32 (5), pp.530 - 538. ⟨10.1179/1878641314Y.0000000041⟩. ⟨hal-02878401⟩
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