Second International Conference on Ultra High Purity Base Metals
UHPM - 95

J. Phys. IV France 05 (1995) C7-381-C7-385
DOI: 10.1051/jp4:1995746

On the Influence of Yttrium and Sulphur on the High Temperature Oxidation Behaviour of Alumina-Forming High Purity FeCrAl Alloys

A. Glazkov^{1, 2}, M. Göbel¹, J. Jedlinski^{1, 3}, J. Schimmelpfennig, G. Borchardt, S. Weber⁴, S. Scherrer⁴ and J. Le Coze<sup>5

1</sup>  Technische Universitat Clausthal, Metallurgisches Zentrum, SFB 180, Robert-Koch-Str. 42, 38678 Clausthal-Zellerfeld
²  on leave from RIAM, Moscow.
³  on leave from AGH, Cracow.
⁴  Ecole des Mines de Nancy, Laboratoire de Métallurgie Physique et Science des Matériaux, Parc de Saurupt, 54042 Nancy cedex, France
⁵  Ecole des Mines, 42023 Saint-Etienne cedex 2, France

Abstract
Many hypotheses have been published in the literature to explain the beneficial effect of reactive elements on the oxidation behaviour of alloys. Although this effect has been known for more than 50 years, the mechanisms involved are not yet very well understood. In order to minimize the influence of impurities in the alloys, in our approach pure metals are used to produce alloys which guarantee well defined starting conditions for two-stage-oxidation experiments. SNMS was chosen to investigate transport phenomena and the growth mechanisms of oxide scale. Sulphur and yttrium yield significant differences in oxide scale composition and microstructure during oxidation at 1200°C.

© EDP Sciences 1995