Nanolayer CrAlN/TiSiN coating designed for tribological applications
| Autor: | Miha Čekada, Goran Dražić, Aleksandar Miletić, Branko Škorić, Lazar Kovačević, Peter Panjan, Janez Kovač, Pal Terek |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science Scanning electron microscope Process Chemistry and Technology 02 engineering and technology engineering.material Tribology Sputter deposition 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Coating Indentation 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Ceramics International. 47:2022-2033 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.09.034 |
| Popis: | With the goal to produce a hard and tough coating intended for tribological applications, CrAlN/TiSiN nanolayer coating was prepared by alternative deposition of CrAlN and TiSiN layers. In the first part of the article, a detailed study of phase composition, microstructure, and layer structure of CrAlN/TiSiN coating is presented. In the second part, its mechanical properties, fracture and tribological behavior are compared to the nanocomposite TiSiN coating. An industrial magnetron sputtering unit was used for coating deposition. X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were used for compositional and microstructural analysis. Mechanical properties and fracture behavior were studied by instrumented indentation and focused ion beam techniques. Tribological properties were evaluated by ball-on-disk test in a linear reciprocal mode. A complex layer structure was found in the nanolayer coating. The TiSiN layers were epitaxially stabilized inside the coating which led to formation of dislocations at interfaces, to introduction of disturbances in the coating growth, and as a result, to development of fine-grained columnar microstructure. Indentation load required for the onset of fracture was twice lower for the nanolayer CrAlN/TiSiN, compared to the nanocomposite TiSiN coating. This agrees very well with their mechanical properties, with H3/E2 being twice higher for the TiSiN coating. However, the nanolayer coating experienced less severe damage, which had a strong impact on tribological behavior. A magnitude of order lower wear rate and four times lower steady state friction coefficient were found for the nanolayer coating. |
| Databáze: | OpenAIRE |
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