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Research Article | Open Access | Just Accepted

A generalized friction law depicting the thermal effects at chemical bonding interface

Yang Wang1,2,3()Yexin Li1Xiao Huang2Jingxiang Xu3,4Yusuke Ootani3Nobuki Ozawa3,5Koshi Adachi6Linmao Qian2Wen Wang2()Momoji Kubo3,5()

1 Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu 610031, China

2 Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China

3 Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

4 College of Engineering Science and Technology, Shanghai Ocean University, 999 Hucheng Ring Road, Pudong, Shanghai 201306, China

5 New Industry Creation Hatchery Center, Tohoku University, 6-6-10, Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

6 Department of Mechanical System Engineering, Graduate School of Engineering, Tohoku University, 6-6-01 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

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Abstract

Non-empirical law depicting how atomic-scale friction behaves is crucial to facilitate the practical design of tribosystems. However, progress in developing a practically usable friction law has stagnated because atomic-scale friction arises from the continuous forming and rupturing of interfacial chemical bonds and such interfacial chemical reactions are difficult to measure precisely. Here, we proposed a usable friction law for atomic-scale contact by using large-scale atomistic simulations to correctly measure the interfacial chemical reactions of a realistic rough surface. This friction model is effective to predict how atomic-scale friction force varies with temperature, sliding velocity, and load. As a special example, our model predicts a velocity-related mountain-like temperature dependence of friction, and this prediction result is then carefully validated by comparing with the ultra-high vacuum atomic force microscopy experiments.

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Friction
Cite this article:
Wang Y, Li Y, Huang X, et al. A generalized friction law depicting the thermal effects at chemical bonding interface. Friction, 2024, https://doi.org/10.26599/FRICT.2025.9441031
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