Lifetime of MoS2 based DFL systems in fretting with and without a Cu-Ni-In under-layer: the dependence on the topography of the surface onto which the DFL is deposited

Laolu-Balogun, E.; Owen, S.; Booth, T.; Pattinson, G.; Shipway, P.H.; Voisey, K.T.

doi:10.1016/j.triboint.2023.108863

Lifetime of MoS2 based DFL systems in fretting with and without a Cu-Ni-In under-layer: the dependence on the topography of the surface onto which the DFL is deposited

Laolu-Balogun, E.; Owen, S.; Booth, T.; Pattinson, G.; Shipway, P.H.; Voisey, K.T.

Authors

E. Laolu-Balogun

S. Owen

T. Booth

G. Pattinson

Professor PHILIP SHIPWAY PHILIP.SHIPWAY@NOTTINGHAM.AC.UK
Cripps Professor of Engineering Materials

KATY VOISEY katy.voisey@nottingham.ac.uk
Associate Professor

Abstract

The superior fretting performance of polymer-bonded MoS2-based dry film lubricant (DFL) coating on a plasma-sprayed Cu-Ni-In under-layer is well known. The Cu-Ni-In under-layer changes both the material and the topography of the surface onto which the DFL is applied. However, the mechanism of how the DFL/Cu-Ni-In interface improves fretting performance requires further investigation. Here, the effects of material and roughness were isolated by using surfaces with the Cu-Ni-In under-layer coating and the TI-6Al-4V substrate in both the ground and grit-blasted conditions. Increasing Cu-Ni-In surface roughness from 1µm to 9µm more than doubled fretting lifetime. The Cu-Ni-In under-layer is shown to provide added durability and extended lifetimes, over fivefold, when compared to Ti-6Al-4V substrate despite having similar surface topographies.

Citation

Laolu-Balogun, E., Owen, S., Booth, T., Pattinson, G., Shipway, P., & Voisey, K. (2023). Lifetime of MoS2 based DFL systems in fretting with and without a Cu-Ni-In under-layer: the dependence on the topography of the surface onto which the DFL is deposited. Tribology International, 188, Article 108863. https://doi.org/10.1016/j.triboint.2023.108863

Journal Article Type	Article
Acceptance Date	Aug 6, 2023
Online Publication Date	Aug 7, 2023
Publication Date	2023-10
Deposit Date	Oct 4, 2023
Publicly Available Date	Oct 5, 2023
Journal	Tribology International
Print ISSN	0301-679X
Electronic ISSN	1879-2464
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	188
Article Number	108863
DOI	https://doi.org/10.1016/j.triboint.2023.108863
Public URL	https://nottingham-repository.worktribe.com/output/24414134
Publisher URL	https://www.sciencedirect.com/science/article/pii/S0301679X23006515?via%3Dihub