Evaluation of interface reactions in thermal barrier ceramic coatings

E. Çelik; E. Avci; F. Yilmaz

doi:10.1016/S0257-8972(97)00383-6

Evaluation of interface reactions in thermal barrier ceramic coatings

E. Çelik^*, E. Avci, F. Yilmaz

^*Corresponding author for this work

Sakarya University

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

In this study, the interface reactions in thermal barrier ceramic coatings (TBCs) on AISI 304L stainless steel substrates were investigated. The plasma-spray technique was employed to deposit metallic and ceramic powders such as MgZrO₃, NiAl + MgZrO₃ and NiCrAl + MgZrO₃ on the substrate. The porosity of these coatings, measured by an optical method, was found to be between 6 and 9%. Oxidation tests were carried out to evaluate the interface reactions in TBCs at temperatures of 800, 900 and 1000°C. The microstructures of the powders, coatings and oxidized coatings were examined by means of an optical microscope and X-ray diffractometry. The results show that the oxidation kinetics depend strongly on oxide layer thickness, temperature, duration of oxidation and composition of the bond coat. It was also observed that the oxidation rate changed with temperature was initially linear and then exponential.

Original language	English
Pages (from-to)	361-365
Number of pages	5
Journal	Surface and Coatings Technology
Volume	97
Issue number	1-3
DOIs	https://doi.org/10.1016/S0257-8972(97)00383-6
Publication status	Published - Dec 1997
Externally published	Yes

Keywords

Interface
Oxidation
Porosity
Thermal barrier coatings

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10.1016/S0257-8972(97)00383-6

Cite this

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title = "Evaluation of interface reactions in thermal barrier ceramic coatings",

abstract = "In this study, the interface reactions in thermal barrier ceramic coatings (TBCs) on AISI 304L stainless steel substrates were investigated. The plasma-spray technique was employed to deposit metallic and ceramic powders such as MgZrO3, NiAl + MgZrO3 and NiCrAl + MgZrO3 on the substrate. The porosity of these coatings, measured by an optical method, was found to be between 6 and 9%. Oxidation tests were carried out to evaluate the interface reactions in TBCs at temperatures of 800, 900 and 1000°C. The microstructures of the powders, coatings and oxidized coatings were examined by means of an optical microscope and X-ray diffractometry. The results show that the oxidation kinetics depend strongly on oxide layer thickness, temperature, duration of oxidation and composition of the bond coat. It was also observed that the oxidation rate changed with temperature was initially linear and then exponential.",

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TY - JOUR

T1 - Evaluation of interface reactions in thermal barrier ceramic coatings

AU - Çelik, E.

AU - Avci, E.

AU - Yilmaz, F.

PY - 1997/12

Y1 - 1997/12

N2 - In this study, the interface reactions in thermal barrier ceramic coatings (TBCs) on AISI 304L stainless steel substrates were investigated. The plasma-spray technique was employed to deposit metallic and ceramic powders such as MgZrO3, NiAl + MgZrO3 and NiCrAl + MgZrO3 on the substrate. The porosity of these coatings, measured by an optical method, was found to be between 6 and 9%. Oxidation tests were carried out to evaluate the interface reactions in TBCs at temperatures of 800, 900 and 1000°C. The microstructures of the powders, coatings and oxidized coatings were examined by means of an optical microscope and X-ray diffractometry. The results show that the oxidation kinetics depend strongly on oxide layer thickness, temperature, duration of oxidation and composition of the bond coat. It was also observed that the oxidation rate changed with temperature was initially linear and then exponential.

AB - In this study, the interface reactions in thermal barrier ceramic coatings (TBCs) on AISI 304L stainless steel substrates were investigated. The plasma-spray technique was employed to deposit metallic and ceramic powders such as MgZrO3, NiAl + MgZrO3 and NiCrAl + MgZrO3 on the substrate. The porosity of these coatings, measured by an optical method, was found to be between 6 and 9%. Oxidation tests were carried out to evaluate the interface reactions in TBCs at temperatures of 800, 900 and 1000°C. The microstructures of the powders, coatings and oxidized coatings were examined by means of an optical microscope and X-ray diffractometry. The results show that the oxidation kinetics depend strongly on oxide layer thickness, temperature, duration of oxidation and composition of the bond coat. It was also observed that the oxidation rate changed with temperature was initially linear and then exponential.

KW - Interface

KW - Oxidation

KW - Porosity

KW - Thermal barrier coatings

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DO - 10.1016/S0257-8972(97)00383-6

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SP - 361

EP - 365

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 1-3

ER -

Evaluation of interface reactions in thermal barrier ceramic coatings

Abstract

Keywords

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