INFLUENCE OF FEMTOSECOND-LASER-INDUCED PERIODIC SURFACE STRUCTURES ON THE TRIBOLOGICAL PERFORMANCE OF CVD NANO-CRYSTALLINE DIAMOND FILMS

Yuxiao Cui, Ping Guo, Yanling Tian, Dawei Zhang, Houjun Qi and Yujun Cai
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Yuxiao Cui: School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, P. R. China‡Tianjin High-end Intelligent Machine Tool Engineering Research Center, Tianjin University of Technology and Education, Tianjin 300222, P. R. China
Ping Guo: School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, P. R. China
Yanling Tian: ��School of Mechanical Engineering, Tianjin University, Tianjin 300072, P. R. China
Dawei Zhang: ��School of Mechanical Engineering, Tianjin University, Tianjin 300072, P. R. China
Houjun Qi: School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, P. R. China
Yujun Cai: School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, P. R. China

Surface Review and Letters (SRL), 2022, vol. 29, issue 05, 1-8

Abstract: Laser-induced periodic surface structures (LIPSS, ripples) are generated on CVD nano-crystalline diamond (NCD) films by femtosecond laser irradiation in air (pulse duration 200 fs and central wavelength 1040 nm). The experimental conditions (laser fluence and spatial spot overlap) are optimized to obtain a 3 × 3 mm2 area covered with homogenous LIPSS. Then, the influence of LIPSS on the frictional performance of NCD films is investigated by dry reciprocating ball-on-disc tests, where ZrO2 ceramic balls are used as counterparts. The results show that the friction behavior is very sensitive to the orientation of nano-structured ripples in LIPSS. The frictional coefficient can be greatly reduced when the sliding direction is parallel to the orientation of the nano-structured ripples, indicating potential benefit of LIPSS on NCD films for frictional applications.

Keywords: LIPSS; femtosecond laser; nano-crystalline diamond films; tribological performance (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22500688

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