Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids
In this study, nano-graphene platelets (NG) and a phosphonium-phosphate-based ionic liquid (IL) were studied as additives to rotorcraft gearbox oil to improve the resistance to scuffing under starved lubricated conditions. Behavior under a loss of lubrication was evaluated using a high-speed ball-on...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/22/7958 |
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| author | Nikhil Murthy Amarendra K. Rai Stephen Berkebile |
| author_facet | Nikhil Murthy Amarendra K. Rai Stephen Berkebile |
| author_sort | Nikhil Murthy |
| collection | DOAJ |
| description | In this study, nano-graphene platelets (NG) and a phosphonium-phosphate-based ionic liquid (IL) were studied as additives to rotorcraft gearbox oil to improve the resistance to scuffing under starved lubricated conditions. Behavior under a loss of lubrication was evaluated using a high-speed ball-on-disk tribometer and a reciprocating cylindrical pin-on-disk tribometer. In addition, the scuffing load and friction over a wide range of sliding and entrainment speeds was determined. On the high-speed ball-on-disk tribometer, an oil blend containing both NG and IL additives was able to operate two times longer than an unadditivized oil before scuffing after the lubrication supply was removed. The increase in time to scuffing was larger for two additives together than the sum of their parts. The additives showed an increase in scuffing load individually but were detrimental when mixed together with a lower scuffing load. The combination of NG and IL show promise as additives to increase the operation time of gears during loss of lubrication, however at the potential cost of decreasing the load-carrying capacity of the oil. |
| first_indexed | 2024-03-10T14:57:32Z |
| format | Article |
| id | doaj.art-1190fe11298d4e9bb620ab7926ce32d4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:57:32Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1190fe11298d4e9bb620ab7926ce32d42023-11-20T20:24:09ZengMDPI AGApplied Sciences2076-34172020-11-011022795810.3390/app10227958Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic LiquidsNikhil Murthy0Amarendra K. Rai1Stephen Berkebile2CCDC Army Research Laboratory, 6340 Rodman Road, APG, MD 21005, USAUES Inc., 4401 Dayton-Xenia Road, Dayton, OH 45432, USACCDC Army Research Laboratory, 6340 Rodman Road, APG, MD 21005, USAIn this study, nano-graphene platelets (NG) and a phosphonium-phosphate-based ionic liquid (IL) were studied as additives to rotorcraft gearbox oil to improve the resistance to scuffing under starved lubricated conditions. Behavior under a loss of lubrication was evaluated using a high-speed ball-on-disk tribometer and a reciprocating cylindrical pin-on-disk tribometer. In addition, the scuffing load and friction over a wide range of sliding and entrainment speeds was determined. On the high-speed ball-on-disk tribometer, an oil blend containing both NG and IL additives was able to operate two times longer than an unadditivized oil before scuffing after the lubrication supply was removed. The increase in time to scuffing was larger for two additives together than the sum of their parts. The additives showed an increase in scuffing load individually but were detrimental when mixed together with a lower scuffing load. The combination of NG and IL show promise as additives to increase the operation time of gears during loss of lubrication, however at the potential cost of decreasing the load-carrying capacity of the oil.https://www.mdpi.com/2076-3417/10/22/7958staved lubricationionic liquidsgraphenefriction |
| spellingShingle | Nikhil Murthy Amarendra K. Rai Stephen Berkebile Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids Applied Sciences staved lubrication ionic liquids graphene friction |
| title | Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids |
| title_full | Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids |
| title_fullStr | Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids |
| title_full_unstemmed | Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids |
| title_short | Improved Loss-of-Lubrication Performance with Lubricants Containing Nano-Graphene Platelets and Ionic Liquids |
| title_sort | improved loss of lubrication performance with lubricants containing nano graphene platelets and ionic liquids |
| topic | staved lubrication ionic liquids graphene friction |
| url | https://www.mdpi.com/2076-3417/10/22/7958 |
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