Paper Titles
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Influence of the Cone Crack Geometry on the Strength Degradation
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Residual Stresses in Laminar Functionally Graded Ceramic Materials
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Modelling of Crack Growth Near the Metallic-Ceramic Interface during Thermal Cycling of Air Plasma Sprayed Thermal Barrier Coatings
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Microstructural Evolution of Thermal Barrier Coatings during Isothermal Oxidation
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Development of Thin Ceramic Coatings for the Protection against Temperature and Stress Induced Rumpling of the Metal Surface of Turbine Blades
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Nucleation of Shear Bands on EB-PVD Thermal Barriers Coatings under Hertzian Indentations
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Ti – Al Intermetallic Layers Produced on Titanium Alloy by Duplex Method
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Microstructural Evolution of Thermal Barrier Coatings during Isothermal Oxidation

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Abstract:

This paper analyses the degradation of a ceramic top coating 70%ZrO2 – 30%CaO deposited onto a stainless steel AISI 304 by thermal spray, using Ni-6%Al-5%Mo as overlay coating. These thermal barrier coatings were heat treated for 48, 120 and 288 h at 800 °C to evaluate the degradation of these materials by isothermal oxidation. The microstructure evolution during oxidation was analysed by environmental scanning electron microscopy, transmission electron microscopy and X ray microanalysis. A thermally grown oxide layer was observed between the overlay coating and the ceramic top coating after oxidation. This layer was formed by a mixed Al, Ni and Mo oxides.

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Periodical:

Key Engineering Materials (Volume 333)

Pages:

269-272

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.333.269

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Online since:

March 2007

Authors:

Alicia Salazar, J. Gómez-García, P. Poza, V. Utrilla

Keywords:

Heat Treatment, Oxidation, Scanning Electron Microscope (SEM), TEM, Thermal Barrier Ceramic Coatings, Thermal Spray, X-Ray Diffraction (XRD)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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