Structural and mechanical properties of carbon incorporation in DC/HiPIMS CrAlN coatings
| Autor: | Peter Roese, Carsten Westphal, Dominic Stangier, U. Berges, Wolfgang Tillmann, J. Debus, Karim Shamout |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry Nitride engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Surfaces Coatings and Films Amorphous solid chemistry Chemical engineering Coating 0103 physical sciences Materials Chemistry engineering Thin film High-power impulse magnetron sputtering 0210 nano-technology Carbon |
| Zdroj: | Surface and Coatings Technology. 374:774-783 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2019.06.053 |
| Popis: | Incorporating carbon into ternary nitride coatings to tune the mechanical and tribological properties of thin films is of great interest in order to improve the performance of tools and components. Especially, the approach to tailor CrAlN coatings by doping transition metals has been extensively studied in recent years. Nevertheless, the microstructural changes, induced by carbon incorporation, especially into Al-rich CrAlN coatings, are not yet fully understood. Thus, detailed investigations of the microstructure, performed by means of synchrotron radiation, using x-ray diffraction and x-ray photoelectron spectroscopy and Raman scattering with different laser excitation (355 nm and 532 nm), were conducted to understand the evolution of the mechanical properties of CrAlCN coatings depending on the carbon content. The results prove that an increasing carbon content significantly influences the microstructure, residual stresses, as well as the mechanical properties of the coatings. The presence of C C and C N bonds was proven by investigating the C 1s orbital. Furthermore, the increasing amount of carbon forms amorphous Cr C structures, which were detected by analyzing the Cr 3p orbital. These results were confirmed for the amorphous phases by Raman scattering additionally indicating the formation of nanocomposite structures due to the formation of carbon nano-onoin like structures. The investigations of the crystalline structure using XRD reveal the existence of a fcc structure for the CrAlN phase as well as small amounts of hexagonal AlN in the CrAlCN coating with the highest carbon content. |
| Databáze: | OpenAIRE |
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