Etude de la cinetique de l'oxydation des aciers a hautes temperatures par reflectometrie des rayons X

摘要

The oxidation behaviour of metals at high temperatures is of paramount importance in many domains of material and engineering science. In order to know the mechanisms of oxidation several experimental methods, e.g. thermogravimetry, are well established. Nevertheless, X-ray methods are not widely used in this field of research. We introduced X-ray reflectometry to investigate the kinetics of the initial oxidation stage of metal samples. To show the capability of this method we present investigations of the oxidation kinetics of a ST37 steel sample oxidized at the temperature of 270 ℃. The results will be verified according to different existing theoretical models [4] and give interesting hints on oxidation mechanisms.