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MANDAL, Paranjayee, EHIASARIAN, Arutiun and HOVSEPIAN, Papken (2015). Isothermal and dynamic oxidation behaviour of Mo−W doped carbon-based coating. Applied Surface Science, 353, 1291-1309.
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Ehiasarian_Isothermal_and_dynamic_oxidation_behaviour_of_Mo.pdf - Accepted Version Creative Commons Attribution Non-commercial No Derivatives. Download (2MB) | Preview |
Abstract
The oxidation behaviour of Mo−W doped carbon-based coating (Mo−W−C) is investigated in elevated temperature (400°C−1000°C). Strong metallurgical bond between Mo−W−C coating and substrate prevents any sort of delamination during heat-treatment. Isothermal oxidation tests show initial growth of metal oxides at 500°C, however graphitic nature of the as-deposited coating is preserved. The oxidation progresses with further rise in temperature and the substrate is eventually exposed at 700°C. The performance of Mo−W−C coating is compared with a state-of-the-art coating, which shows preliminary oxidation at 400°C and local delamination of the coating at 500°C leading to substrate exposure. The graphitisation starts at 400°C and the diamond-like structure is completely converted into the graphite-like structure at 500°C. Dynamic oxidation behaviour of both the coatings is investigated using Thermo-gravimetric analysis carried out with a slow heating rate of 1°C/min from ambient temperature to 1000°C. Mo−W−C coating resists oxidation up to ~800°C whereas delamination of coating is observed beyond ~380°C. In summary, Mo−W−C coating provides improved oxidation resistance at elevated temperature compared to coating.
| Item Type: | Article |
|---|---|
| Additional Information: | Available online 15 July 2015 |
| Research Institute, Centre or Group - Does NOT include content added after October 2018: | Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Nanotechnology Centre for PVD Research |
| Identification Number: | https://doi.org/10.1016/j.apsusc.2015.07.057 |
| Page Range: | 1291-1309 |
| Depositing User: | Yashodhan Purandare |
| Date Deposited: | 25 Jun 2015 09:26 |
| Last Modified: | 18 Mar 2021 05:24 |
| URI: | https://shura.shu.ac.uk/id/eprint/10433 |
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