Abstract
In this paper, the thin coatings , consisting of various metal and ceramic alternating layers, have been chosen as object of researches. The coatings were deposited using an ion plasma spraying setup equipped with a magnetron evaporation system. The thickness of each of the layers has composed 8–30 nm, while the general thickness of the coating does not exceed 10 μm. Their strength and erosive properties have been investigated. The strength of coatings was characterized as a complex of the physical-mechanical properties , which are measured with use of various schemes of a discrete and continuous indentation and are defined by the term “indent-diagnostics”. By results of researches a good correlation between data of indent-diagnostics of coatings and data of erosive tests is obtained. It has allowed us to recommend a methods of laboratory indent-diagnostics for an evaluation of the erosion resistance of nanocomposite coatings instead of conducting a complex bench or full-scale tests.
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Notes
- 1.
A growth defect of a coating is understood as the violation of the homogeneity of a coating during the layer-by-layer deposition (growth) of the coating. For example, at a high roughness of the substrate, the layer-by-layer growth is violated, because the number of layers on the protrusions and depressions of the relief is not the same. This feature leads to the formation of internal interfaces (boundaries) and fragmentation of the coating structure.
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Acknowledgements
The work was carried out with partial financial support from Russian Foundation for Basic Research (Project No. 15-08-06181).
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Varavka, V.N., Kudryakov, O.V., Zabiyaka, I.Y., Morozkin, I.S. (2017). Researching the Properties of Nanocomposite Coatings by the Methods of Indent-Diagnostics. In: Parinov, I., Chang, SH., Jani, M. (eds) Advanced Materials. Springer Proceedings in Physics, vol 193. Springer, Cham. https://doi.org/10.1007/978-3-319-56062-5_34
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