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Improving Fe3Al alloy resistance against high temperature oxidation by pack cementation process |
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| Authors: | Piotr Juzoń Marta Ziemnicka Kazimierz Przybylski |
| Institution: | a Laboratoire de Recherches sur la Reactivité des Solides, UMR 5613 CNRS, av. A.Savary, BP 47870, 21078 Dijon Cedex, France b AGH University of Science and Technology, Faculty of Material Science and Ceramics, Department of Solid State Chemistry, al. Mickiewicza 30, 30-059 Cracow, Poland c AGH University of Science and Technology, Faculty of Material Science and Ceramics, Department of Special Ceramic, al. Mickiewicza 30, 30-059 Cracow, Poland |
| Abstract: | The paper presents the results of oxidation tests of Fe3Al-based alloys containing additions of Cr, Zr, B, and C, with and without an aluminide coating. The coating was formed by a pack cementation process in which the surface of material got enriched in aluminum. The Al-rich layer was intended to enhance the tendency of Al2O3 formation. The slow-growing Al2O3 scale provides the best corrosion protection for structural materials at high temperatures. The cyclic oxidation tests were performed in laboratory air at 1373 K. The structure and composition of oxide scales as well as their adherence were evaluated and compared for the materials with and without aluminide coatings. Surface enrichment in aluminum and effect minor addition of Zr on oxidation behavior was discussed. |
| Keywords: | Oxidation resistance Iron aluminide alloys Protective coatings Zr doping effect |
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