Evaluation of cold sprayed graphene nanoplates–Inconel 718 composite coatings
Evaluation of cold sprayed graphene nanoplates–Inconel 718 composite coatings
Graphene nanoplates (GNPs)–Inconel 718 (IN718) composite coatings were fabricated via high pressure cold spray technique with varying contents of GNPs mixed with IN718 powder. The microstructure, mechanical properties and tribological behavior of the composite coatings were systemically investigated. IN718-GNPs composite coatings could be effectively formed with the incorporation of 0.15 wt% GNPs that were uniformly distributed within the cold sprayed coatings. The deposition efficiency tended to decrease with increasing GNPs content. Following this lead, the surface roughness of the as-sprayed IN718-GNPs composite coatings was found to be related to the addition of GNPs. The surface roughness gradually increased with increasing GNPs content and the composite coating surfaces had plateau-like and crater-like features. TEM lamellae were extracted from the IN718-IN718 and IN718-GNPs interfaces of the composite coatings by focused ion beam milling. The interface between the GNPs and the IN718 matrix was clean and well bonded, illustrating a mechanical bonding. Most importantly, we found that the IN718-GNPs composite coatings provided appreciable reductions in coefficient of friction and wear rate compared to the pure IN718 coatings due to the GNPs’ exfoliated surfaces and intrinsically high lubricating characteristics. Hence, the IN718-GNPs composite coatings could be excellent candidates for low friction and high wear-resistance applications.
Graphene nanoplates (GNPs), High pressure cold spray, Inconel 718, Mechanical properties, Microstructure, Wear
Sun, Wen
38403bb0-2b99-4958-b9ee-39b4016d0968
Tan, Adrian Wei Yee
3d644676-a520-4f41-b7f1-410d1c46689d
Bhowmik, Ayan
d5756d8b-4fd7-4272-987f-35901f169cf6
Xue, Fei
6598681b-dd12-4cb3-891d-53388277f52c
Marinescu, Iulian
eb6fb154-1605-451d-a446-f3148bb0da0b
Liu, Erjia
f0eb8f01-7079-4d8a-9687-f00250b31ffd
25 November 2019
Sun, Wen
38403bb0-2b99-4958-b9ee-39b4016d0968
Tan, Adrian Wei Yee
3d644676-a520-4f41-b7f1-410d1c46689d
Bhowmik, Ayan
d5756d8b-4fd7-4272-987f-35901f169cf6
Xue, Fei
6598681b-dd12-4cb3-891d-53388277f52c
Marinescu, Iulian
eb6fb154-1605-451d-a446-f3148bb0da0b
Liu, Erjia
f0eb8f01-7079-4d8a-9687-f00250b31ffd
Sun, Wen, Tan, Adrian Wei Yee, Bhowmik, Ayan, Xue, Fei, Marinescu, Iulian and Liu, Erjia
(2019)
Evaluation of cold sprayed graphene nanoplates–Inconel 718 composite coatings.
Surface and Coatings Technology, 378 (11), [125065].
(doi:10.1016/j.surfcoat.2019.125065).
Abstract
Graphene nanoplates (GNPs)–Inconel 718 (IN718) composite coatings were fabricated via high pressure cold spray technique with varying contents of GNPs mixed with IN718 powder. The microstructure, mechanical properties and tribological behavior of the composite coatings were systemically investigated. IN718-GNPs composite coatings could be effectively formed with the incorporation of 0.15 wt% GNPs that were uniformly distributed within the cold sprayed coatings. The deposition efficiency tended to decrease with increasing GNPs content. Following this lead, the surface roughness of the as-sprayed IN718-GNPs composite coatings was found to be related to the addition of GNPs. The surface roughness gradually increased with increasing GNPs content and the composite coating surfaces had plateau-like and crater-like features. TEM lamellae were extracted from the IN718-IN718 and IN718-GNPs interfaces of the composite coatings by focused ion beam milling. The interface between the GNPs and the IN718 matrix was clean and well bonded, illustrating a mechanical bonding. Most importantly, we found that the IN718-GNPs composite coatings provided appreciable reductions in coefficient of friction and wear rate compared to the pure IN718 coatings due to the GNPs’ exfoliated surfaces and intrinsically high lubricating characteristics. Hence, the IN718-GNPs composite coatings could be excellent candidates for low friction and high wear-resistance applications.
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Accepted/In Press date: 12 October 2019
Published date: 25 November 2019
Additional Information:
Funding Information:
This work was financially supported by the National Research Foundation of Singapore (NRF), Rolls-Royce (RR), and Nanyang Technological University (NTU), Singapore, with the research grant number of MRT3.1, and by Industry Alignment Fund (IAF) of Singapore A*STAR, RR and NTU with the research grant: ARMS 1.1. Authors thanked Dr. Sérgio G. Echeverrigaray from the National University of Singapore for his collaboration on this work.
Funding Information:
This work was financially supported by the National Research Foundation of Singapore ( NRF ), Rolls-Royce (RR), and Nanyang Technological University ( NTU ), Singapore, with the research grant number of MRT3.1 , and by Industry Alignment Fund ( IAF ) of Singapore A*STAR , RR and NTU with the research grant: ARMS 1.1 . Authors thanked Dr. Sérgio G. Echeverrigaray from the National University of Singapore for his collaboration on this work.
Publisher Copyright:
© 2019
Keywords:
Graphene nanoplates (GNPs), High pressure cold spray, Inconel 718, Mechanical properties, Microstructure, Wear
Identifiers
Local EPrints ID: 475787
URI: http://eprints.soton.ac.uk/id/eprint/475787
ISSN: 0257-8972
PURE UUID: 10fe4bc4-b21e-4397-8ec0-f51dd922acf3
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Date deposited: 28 Mar 2023 16:49
Last modified: 17 Mar 2024 13:14
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Contributors
Author:
Wen Sun
Author:
Adrian Wei Yee Tan
Author:
Ayan Bhowmik
Author:
Fei Xue
Author:
Iulian Marinescu
Author:
Erjia Liu
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