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Role of Carbon Nanotube on Multi-Length Scale Tribological Properties of Al2O3-Based Thermal Barrier Coating
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Author(s): Ariharan S. (FunGlass – Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Slovakia)and Rita Maurya (Department of Materials Science and Engineering, National Institute of Technology-Hamirpur, India)
Copyright: 2022
Pages: 25
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.ch002
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Abstract
Magnificently developed Al2O3, 3YSZ, 8YSZ, and CNT-based thermal barrier coatings (TBCs) were subjected to study multi-length scale tribological behaviour (fretting wear and micro-scratch) of the composite coatings. Subsequently, the role of constituents of the composite on the tribological behaviour of the coatings has been recognized. Fretting wear rate and the dominative wear mechanism are identified. The fretting wear behaviour is evaluated with a distinct representation (frictional force mapping) to understand the transition of regimes. Further, micro-scratching is used to assess the composite coatings against the sharp edges. The critical load of failure and scratch characteristics (scratch hardness, toughness, and scratch resistance) are appraised to find the suitability of the composite in TBC. Notably, the role of CNT in a multi-length scale is reported quantitatively. Thus, the chapter provides a comprehensive overview of the Al2O3-based composites that deal with the understanding of the multi-length scale tribological properties at room temperature.
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