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<p>The factors related to wear in the failure of artificial joints account for 14% to 33%. Among them, the Ti-5Al-4&#xa0;V titanium alloy becomes the optimization focus due to its high friction coefficient (average of 0.48 for the matrix) and insufficient wear resistance. This study innovatively integrates the biomimetic V-shaped texture design of shark scales and the PTFE–MoS<sub>2</sub> composite coating technology to systematically enhance its service performance through a multi-scale collaborative mechanism. Through laser marking technology, V-shaped textures are constructed on the surface of the Ti-5Al-4&#xa0;V matrix, and a PTFE solution is combined with a 15% mass fraction of MoS<sub>2</sub> powder, which is coated on the textured surface and then solidified at high temperature to form a biocompatible coating. This study confirms that the collaborative design of the biomimetic V-shaped texture and the PTFE–MoS<sub>2</sub>-15% coating can achieve a significant effect of reducing the friction coefficient by more than 64%, the wear amount by more than 21%, and the stress concentration by 79%, providing a new paradigm for extending the life span of artificial joints.</p>

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Research on the Coordinated Optimization of Frictional Properties of Titanium Alloy Artificial Joints by Bionic Textures and Composite Coatings

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • Zihao Liu,
  • Xiaoliang Shi,
  • Haobing Hu,
  • Xiyao Liu,
  • Chaohua Wu

摘要

The factors related to wear in the failure of artificial joints account for 14% to 33%. Among them, the Ti-5Al-4 V titanium alloy becomes the optimization focus due to its high friction coefficient (average of 0.48 for the matrix) and insufficient wear resistance. This study innovatively integrates the biomimetic V-shaped texture design of shark scales and the PTFE–MoS2 composite coating technology to systematically enhance its service performance through a multi-scale collaborative mechanism. Through laser marking technology, V-shaped textures are constructed on the surface of the Ti-5Al-4 V matrix, and a PTFE solution is combined with a 15% mass fraction of MoS2 powder, which is coated on the textured surface and then solidified at high temperature to form a biocompatible coating. This study confirms that the collaborative design of the biomimetic V-shaped texture and the PTFE–MoS2-15% coating can achieve a significant effect of reducing the friction coefficient by more than 64%, the wear amount by more than 21%, and the stress concentration by 79%, providing a new paradigm for extending the life span of artificial joints.