Microstructure, mechanical and high temperature tribological behaviour of graphene nanoplatelets reinforced plasma sprayed titanium nitride coating
| Autor: | Biswajyoti Mukherjee, Anup Kumar Keshri, Krishna Kant Pandey, Aminul Islam, Shreshtha Ranjan, Rohit Kumar Gupta |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science chemistry.chemical_element Titanium alloy 02 engineering and technology engineering.material Tribology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Titanium nitride chemistry.chemical_compound Fracture toughness Lubricity Coating chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Composite material 0210 nano-technology Tin |
| Zdroj: | Journal of the European Ceramic Society. 40:660-671 |
| ISSN: | 0955-2219 |
| Popis: | In the present study, graphene nanoplatelets (GNPs: 1–2 wt. %) reinforced TiN coating were successfully fabricated over titanium alloy using a reactive shroud plasma spraying technique. All coatings were completely oxide free, while the addition of GNPs suppressed the non-stoichiometric TiN0.3 phase. Improvement of 19%, 18% and 300% in hardness, elastic modulus and fracture toughness was achieved by mere addition of 2 wt. % GNP. The addition of GNP in TiN also reduced the wear volume loss and the wear rate of the coatings for the entire range of temperature (293–873 K). Moreover, GNPs also manifested the coefficient of friction (COF) of the coating. Post wear characterization revealed that the presence of GNP throughout the wear track even at 873 K. The multi-layer structure of GNPs assisted in long term lubricity to the surface and increased the wear resistance of the coating. |
| Databáze: | OpenAIRE |
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