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Study of Oxidation Behavior of Thermal Spray Coating on Superalloys at 900 °C

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Abstract:

An addition of cerium oxide to NiCrAiY coatings could boost the high temperature properties of the coatings in the actual service condition due to the purification of its microstructures. High temperature oxidation studies of D-Gun sprayed MCrAlY coatings with minor addition of CeO2 is inadequate in the literature. Therefore, the present work was focused to study the effect of cerium oxide on the high temperature oxidation behavior coatings on superalloys. Cyclic oxidation tests were carried out for 100 cycles at 900 °C to study the oxidation kinetics of un-coated and bare superalloys. The corroded products obtained during cyclic oxidation of coatings were subjected to XRD, FE-SEM/EDAX and X-ray mapping analysis to reveal the high temperature oxidation mechanisms.

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Periodical:

Applied Mechanics and Materials (Volume 819)

Pages:

553-562

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.819.553

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Online since:

January 2016

Authors:

Subhash Kamal*, Korada Viswanatha Sharma

Keywords:

Coating, Detonation-Gun Process, Oxidation, Rare Earth, Superalloys, Thermal Spray Coating

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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