Beneficial Effect of Pt and of Pre-Oxidation on the Oxidation Behaviour of an NiCoCrAlYTa Bond-Coating for Thermal Barrier Coating Systems |
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Authors: | Aur��lie Vande Put Djar Oquab Eve P��r�� Aymeric Raffaitin Daniel Monceau |
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Affiliation: | 1. Institut Carnot CIRIMAT, ENSIACET, 4 all??e Emile Monso, BP 44362, 31432, Toulouse Cedex 4, France 2. Universit?? de Pau et des Pays de l??Adour, IPREM, H??lioparc, 2 Avenue du pr??sident d??Angot, 64053, Pau Cedex 9, France 3. Turbomeca, 64511, Bordes Cedex, France
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Abstract: | The oxidation behaviour of a thermal barrier coating (TBC) system is a major concern as the growth of the thermally grown oxide (TGO) layer on the bond-coating creates stresses that greatly favour the thermal barrier spallation. To delay the loss of the thermal protection provided, research has focused on the bond-coating composition and microstructure as well as on the parameters required for a suitable pre-oxidation treatment before the deposition of the ceramic top coat. Platinum is known to enhance the oxidation/corrosion resistance of MCrAlY coatings. The effect of Pt on the oxidation behaviour of a NiCoCrAlYTa coating was assessed in this study. In addition, pre-oxidation treatments were conducted to determine if the oxidation behaviour of the modified NiCoCrAlYTa coating could be further improved. |
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