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Erschienen in:
A Remedy for a Family of Dissipative, Unconditionally Stable Explicit Integration Methods Kapitel lesen Erstes Kapitel lesen

2019 | OriginalPaper | Buchkapitel

Evaluation of Hot Corrosion Behavior of APS and HVOF Sprayed Thermal Barrier Coatings (TBCs) Exposed to Molten Na2SO4 + V2O5 Salt at 1000 °C

verfasst von : Mustafa Kaplan, Mesut Uyaner, Yasin Ozgurluk, Kadir Mert Doleker, Abdullah Cahit Karaoglanli

Erschienen in: Engineering Design Applications

Verlag: Springer International Publishing

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Abstract

Hot corrosion is a very destructive failure mechanism for thermal barrier coatings (TBCs) during service conditions. In the present study, a CoNiCrAlY is coated using atmospheric plasma spray (APS) and high velocity oxy-fuel (HVOF) techniques which produces TBCs that were exposed to 50% Na2SO4 and 50% V2O5 molten salts at 1000 °C. The top surface was visually inspected at the end of each four-hour cycle to determine the lifetime of TBCs. The failure criteria required for the termination of the hot corrosion cycles was assumed to be 25% cracking and spallation of top coats. X-Ray Diffraction (XRD) analysis was performed before and after hot corrosion tests in order to observe new phases which may occur in the top coating. After scanning electron microscopy (SEM) images of cross-section samples of hot corrosion tests are completed, samples were taken. As a result, it has been observed that the lifetimes of HVOF bond-coated TBCs are longer.

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Metadaten
Titel
Evaluation of Hot Corrosion Behavior of APS and HVOF Sprayed Thermal Barrier Coatings (TBCs) Exposed to Molten Na2SO4 + V2O5 Salt at 1000 °C
verfasst von
Mustafa Kaplan
Mesut Uyaner
Yasin Ozgurluk
Kadir Mert Doleker
Abdullah Cahit Karaoglanli
Copyright-Jahr
2019
Buch
Engineering Design Applications

Print ISBN: 978-3-319-79004-6

Electronic ISBN: 978-3-319-79005-3

Copyright-Jahr: 2019

DOI
https://doi.org/10.1007/978-3-319-79005-3_28

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