Currently, aluminide compounds are the most effective materials to resist under high temperature conditions because they combine many beneficial properties (low density, high temperature mechanical properties...). Thus, an Al2O3 scale can be formed. Moreover, the addition of small particles of oxygen-active-elements into materials can allow to improve their corrosion resistance thereby increasing the adhesion of the oxide scale. The aim of our study was to form aluminide coatings on the surface of a model alloy (Fe-30Cr) by aluminisation at 900degreesC or 1000degreesC for 3 to 5 hours using a pack-cementation process. Some of these materials were doped with yttria which was introduced by metal organic chemical vapour deposition (MOCVD) in addition to the pack cementation. The high temperature oxidation resistance of doped and undoped aluminised alloys was studied by oxidising the substrates at 1000degreesC for 100 hours in a thermogravimetric analyser (TGA) in air under the atmospheric pressure. The samples were also submitted to cyclic oxidation tests at 1000degreesC. The aluminide materials exhibit an excellent high temperature oxidation resistance at 1000degreesC. Their general behavior is close to that of commercial alumina-forming steels. The resistance of the samples doped with yttria is more or less improved.