Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage

Sudip Saha; Jack Janik; German Mills; Jun Qu; Robert L. Jackson

doi:10.1109/HOLM56222.2024.10768327

Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage

Sudip Saha, Jack Janik, German Mills, Jun Qu, Robert L. Jackson

Surface Engineering and Tribology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In electric vehicles and similar applications, leakage currents threaten lubricated bearing and gear interfaces, leading to significant surface damage such as micro-pitting. This damage is typically caused by electrical arc or plasma initiation, resulting in localized rapid temperature rises. Recent studies have highlighted the potential of oil-soluble ionic liquids (ILs) as promising antiwear (AW) additives. However, their effects on improving the electrically induced bearing damage are yet to be explored. Also, Ag nanoparticles have proved to be significantly effective in reducing electrically induced micropitting when added with grease. Further investigation is required to determine the effectiveness of Ag nanoparticles in lubricants without grease thickeners. Therefore, this research investigates the impact of ionic liquids and Ag nanoparticles as additives in PAO-based lubricants on electrically induced bearing damage. Reciprocating rolling sphere-on-disk tests were conducted under electro-tribological loads using E52100 steel samples. Surface analysis using optical spectroscopy and scanning electron microscopy (SEM) was carried out for quantifying surface damages.

Original language	English
Title of host publication	Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9798331529079
DOIs	https://doi.org/10.1109/HOLM56222.2024.10768327
State	Published - 2024
Event	69th IEEE Holm Conference on Electrical Contacts, HOLM 2024 - Annapolis, United States Duration: Oct 6 2024 → Oct 10 2024

Publication series

Name	Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
ISSN (Print)	0361-4395

Conference

Conference	69th IEEE Holm Conference on Electrical Contacts, HOLM 2024
Country/Territory	United States
City	Annapolis
Period	10/6/24 → 10/10/24

Funding

We gratefully acknowledge The Timken Company for providing the 52100 test samples and Oak Ridge National Laboratory (ORNL) for supplying the PAO and ionic liquid. ORNL produced the ionic liquid samples and consulted on the testing results, supported by the Vehicle Technologies Office, Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy. We also thank Bruker Nano Surfaces for providing the rolling element test fixtures.

Funders	Funder number
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory
Timken Company	52100

Keywords

bearing damage
Electric vehicle
ionic liquid
nanoparticle additive

Access to Document

10.1109/HOLM56222.2024.10768327

Cite this

Saha, S., Janik, J., Mills, G., Qu, J., & Jackson, R. L. (2024). Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage. In Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024 (Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/HOLM56222.2024.10768327

Saha, Sudip ; Janik, Jack ; Mills, German et al. / Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage. Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024. Institute of Electrical and Electronics Engineers Inc., 2024. (Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts).

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title = "Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage",

abstract = "In electric vehicles and similar applications, leakage currents threaten lubricated bearing and gear interfaces, leading to significant surface damage such as micro-pitting. This damage is typically caused by electrical arc or plasma initiation, resulting in localized rapid temperature rises. Recent studies have highlighted the potential of oil-soluble ionic liquids (ILs) as promising antiwear (AW) additives. However, their effects on improving the electrically induced bearing damage are yet to be explored. Also, Ag nanoparticles have proved to be significantly effective in reducing electrically induced micropitting when added with grease. Further investigation is required to determine the effectiveness of Ag nanoparticles in lubricants without grease thickeners. Therefore, this research investigates the impact of ionic liquids and Ag nanoparticles as additives in PAO-based lubricants on electrically induced bearing damage. Reciprocating rolling sphere-on-disk tests were conducted under electro-tribological loads using E52100 steel samples. Surface analysis using optical spectroscopy and scanning electron microscopy (SEM) was carried out for quantifying surface damages.",

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Saha, S, Janik, J, Mills, G, Qu, J & Jackson, RL 2024, Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage. in Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024. Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts, Institute of Electrical and Electronics Engineers Inc., 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024, Annapolis, United States, 10/6/24. https://doi.org/10.1109/HOLM56222.2024.10768327

Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage. / Saha, Sudip; Janik, Jack; Mills, German et al.
Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024. Institute of Electrical and Electronics Engineers Inc., 2024. (Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Saha S, Janik J, Mills G, Qu J, Jackson RL. Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage. In Electrical Contacts 2024 - Proceedings of the 69th IEEE Holm Conference on Electrical Contacts, HOLM 2024. Institute of Electrical and Electronics Engineers Inc. 2024. (Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts). doi: 10.1109/HOLM56222.2024.10768327

Influence of Ionic Liquids and Ag Nanoparticles as Lubricant Additives on Electrically Induced Bearing Damage

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