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Effect of Na2SO4-V2O5 Mixture on Y2O3 Stabilized ZrO2 Thermal Barrier Coatings Exposed at High Temperature

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Abstract:

Yttria stabilized zirconia thermal barrier coating (TBC) along with CoNiCrAlY bondcoat was deposited using air plasma spray on Inconel-X750 superalloy. The coated samples were exposed at 9500C in a mixture of Na2SO4 and V2O5. The exposed specimens were investigated using XRD and SEM. The formation of spinel and perovskite structures was revealed at the interface of topcoat and the bondcoat. XRD analyses of the samples confirmed phase transformation of the tetragonal zirconia into monoclinic zirconia and yttrium vanadate.

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Periodical:

Advanced Materials Research (Volume 1101)

Pages:

423-427

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1101.423

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Online since:

April 2015

Authors:

Imran Nazir Qureshi, Muhammad Shahid, Aamir Nusair Khan

Keywords:

Hot Corrosion, Monoclinic Zirconia, Perovskite Structure, Thermal Barrier Coating, Yttrium Vanadate

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