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Oxidation and Tribology of Al2O3-Induced LaTi2Al9O19/YSZ Double Ceramic Layer Coatings: Tribo-Oxidation
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Author(s): Pritee Purohit (Army Institute of Technology, India)and Shashikant Tukaram Vagge (Government College of Engineering, Pune, India)
Copyright: 2022
Pages: 19
Source title:
Handbook of Research on Tribology in Coatings and Surface Treatment
Source Author(s)/Editor(s): Amirhossein Pakseresht (FunGlass – Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Slovakia)and Omid Sharifahmadian (FunGlass – Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Slovakia)
DOI: 10.4018/978-1-7998-9683-8.ch003
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Abstract
In the present work, the alumina-induced thermal barrier coatings with LaTi2Al9O19 (LTA) and yttria-stabilized zirconia (YSZ), LTA/YSZ double ceramic layer (DCL) are studied for oxidation and wear tests. Different coatings combinations with varying thickness of LaTi2Al9O19 (LTA) top coat layer are developed using plasma spray method and are tested for isothermal oxidation and wear test. An Alumina layer is induced after the bond coat layer to provide a readily available oxide layer. The activation energy is calculated using the Arrhenius equation. Arrhenius plots are developed using oxidation kinetics. Coatings are tested for wear performance also. The coating combination with a higher thickness of LTA proved best for both oxidation and wear performances. Surface characterization is done using EDS and XRD analysis.
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