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Research Article | Open Access | Just Accepted

Role of friction in tribofilm formation: Tribochemistry evolution of proteins under AFM single-asperity friction

Jiachen ChenHeng LiuYu Yan( )

Beijing Advanced Innovation Center for Materials Genome Engineering, Corrosion and Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 100083, China

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Abstract

Recent studies indicated that tribochemical reaction layers will form on metal-on-metal bearing surfaces, which may play a significant role in the performance and longevity of artificial joints. The purpose of this study was to determine the role of friction in the formation of tribofilms, and an in situ atomic force microscopy single-asperity sliding setup was used to perform in situ microscopic friction experiments to control the contact area and load. Time-of-flight secondary ion mass spectrometry and Raman spectrum were also employed to investigate changes in the composition and structure of the proteins at different sliding cycles. The results showed that the proteins first unfolded under shear and then underwent chain breakage, dehydrogenation, and desulfurization over time as friction progressed. Lastly, the carbonaceous fragments did not show graphitization trends under only shear stress.

Friction
Cite this article:
Chen J, Liu H, Yan Y. Role of friction in tribofilm formation: Tribochemistry evolution of proteins under AFM single-asperity friction. Friction, 2025, https://doi.org/10.26599/FRICT.2025.9441073

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Received: 05 February 2024
Revised: 14 August 2024
Accepted: 22 January 2025
Available online: 23 January 2025

© The Author(s) 2025.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).

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