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<p>This research focuses on enhancing the tribological performance of polytetrafluoroethylene (PTFE) coatings on AISI 5210 alloy steel, addressing the material’s inherent wear limitations. PTFE is highly regarded for its chemical stability, low surface energy, and excellent heat resistance, but its poor mechanical properties limit its effectiveness in high-wear tribological applications. To overcome these limitations, two enhancement approaches were explored: (1) the incorporation of graphene oxide (GO) into the PTFE matrix, and (2) the application of PTFE on laser-engraved surfaces with distinct microtextures, including Hilbert, Peano, Sierpinski, Honeycomb, and Gosper patterns. Tribological performance was assessed using a Pin-on-Disk tribometer, while surface morphology and wear mechanisms were characterized through Scanning Electron Microscopy (SEM). The optimal sintering temperature for the PTFE coatings was identified to ensure optimal tribological properties and was consistently maintained throughout the study. The results highlight that the honeycomb-engraved surface achieved the lowest friction, while 5 wt.% GO-PTFE exhibited the greatest wear resistance. The GO-PTFE composite coating reduced friction by 34% and specific wear rate by 89%, whereas the engraved PTFE surface lowered friction by 51% and specific wear rate by 58%. These findings confirm the effectiveness of GO reinforcement and laser texturing in enhancing PTFE’s tribological performance.</p>

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Enhancement of Tribological Behavior of PTFE-Coated AISI 52100 Alloy Using Graphene Oxide and Laser Texturing: A Study Using Custom-Developed Dip Coating Setup

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Vivek V. Kamal,
  • S. Aswin,
  • S. Rani,
  • K. Bindu Kumar,
  • K. Aswin,
  • L. Amal Raj,
  • M. A. Aadidev

摘要

This research focuses on enhancing the tribological performance of polytetrafluoroethylene (PTFE) coatings on AISI 5210 alloy steel, addressing the material’s inherent wear limitations. PTFE is highly regarded for its chemical stability, low surface energy, and excellent heat resistance, but its poor mechanical properties limit its effectiveness in high-wear tribological applications. To overcome these limitations, two enhancement approaches were explored: (1) the incorporation of graphene oxide (GO) into the PTFE matrix, and (2) the application of PTFE on laser-engraved surfaces with distinct microtextures, including Hilbert, Peano, Sierpinski, Honeycomb, and Gosper patterns. Tribological performance was assessed using a Pin-on-Disk tribometer, while surface morphology and wear mechanisms were characterized through Scanning Electron Microscopy (SEM). The optimal sintering temperature for the PTFE coatings was identified to ensure optimal tribological properties and was consistently maintained throughout the study. The results highlight that the honeycomb-engraved surface achieved the lowest friction, while 5 wt.% GO-PTFE exhibited the greatest wear resistance. The GO-PTFE composite coating reduced friction by 34% and specific wear rate by 89%, whereas the engraved PTFE surface lowered friction by 51% and specific wear rate by 58%. These findings confirm the effectiveness of GO reinforcement and laser texturing in enhancing PTFE’s tribological performance.