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Palladium and tantalum aluminide coatings for high-temperature oxidation resistance of titanium alloy IMI 834

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Abstract

The present article explains the efforts made in developing new protective coatings based on palladium, tantalum, and aluminum with considerably improved oxidation resistance for effective protection of titanium alloy IMI 834. Systematic characterization was carried out on as-prepared as well as oxidized coatings and these results are presented. The performance of new coatings was evaluated by generating weight-gain data as a function of time followed by detailed characterization in order to confirm the ability of the coatings to prevent oxidation and alpha-case formation. The results showed that tantalum aluminide and simple aluminide coatings exhibit improved oxidation resistance when compared to palladium aluminide. Finally, the advantages of developed new coatings and the necessity of their use in modern gas turbine engines that allow the alloy to be used safely at high temperatures, which in turn would enhance the efficiency of gas-turbine engine-compressor sections, will be stressed.

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Acknowledgments

The principal author (I. Gurrappa) is grateful to the European Commission for providing financial assistance for his stay at Northumbria University, United Kingdom. The authors would like to thank Prof. Alistair Sambell, Dean, School of Computing, Engineering and Information Sciences, Northumbria University, for his keen interest in this project, support, and encouragement. The principal author would like to thank Prof. P. Rama Rao, ARCI, Dr. D. Banerjee, Chief Controller (DRDO), and Dr. G. Malakondaiah, Director, DMRL, Hyderabad, for their constant support and encouragement.

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Authors and Affiliations

  1. Advanced Materials Research Institute, School of Computing, Engineering and Information Sciences, Northumbria University, Ellison building, Newcastle Upon Tyne, NE1 8ST, UK

    I. Gurrappa, A. Wilson & P. K. Datta

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  1. I. Gurrappa
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  2. A. Wilson
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  3. P. K. Datta
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Correspondence to I. Gurrappa.

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Gurrappa, I., Wilson, A. & Datta, P.K. Palladium and tantalum aluminide coatings for high-temperature oxidation resistance of titanium alloy IMI 834. J Coat Technol Res 6, 257–268 (2009). https://doi.org/10.1007/s11998-008-9113-9

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  • DOI: https://doi.org/10.1007/s11998-008-9113-9

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