Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-715-C7-720
Influence of the chemical composition and the fabrication process on the behaviour of high temperature oxidation of Fe-Cr-Al alloysF. CLEMENDOT1, F. ARNOLDI1, J.B. CEREDE1, B. DIONNET2, F. NARDOU2 and J.C. VAN DUYSEN1
1 Electricité de France, DER/EMA Les Renardières, BP. 1, 77250 Moret sur Loing, France
2 Laboratoire de Céramiques Nouvelles, URA 320 du CNRS, 123 avenue Albert Thomas, 87060 Limoges cedex, France
The oxidation behaviour of four industrial Fe-Cr-Al alloys was studied. Two of them were Fe-Cr-Al alloys fabricated either by melting or by powder metallurgy. The two other ones were Fe-Cr-Al-Y alloys either produced by melting or by mechanical alloying. On these alloys, we determined oxidation kinetics and observed the morphology of the oxide layer after isothermal and cyclic exposures from 1000°C up to 1300°C. The beneficial effect of yttrium on the adherence of oxide layers was confirmed. The powder metallurgy fabrication route does not improve the oxidation resistance of yttrium-free alloys. On the other hand, the association of the powder metallurgy and the addition of yttrium allow the manufacturing of alloys which present an excellent behaviour to high temperature oxidation.
© EDP Sciences 1993