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<p>Zirconium (Zr)-based alloys have great potential for orthopedic implants due to their excellent mechanical properties, corrosion resistance, and biocompatibility. However, untreated Zr-based alloys exhibit inadequate wear resistance, which limits their service life as joint prostheses. This study employed a combined surface texturing and thermal oxidation approach to enhance wear resistance. Biomimetic micro-textures were fabricated on the alloy surface via laser processing, followed by high-temperature oxidation to produce a textured ceramic coating. The influence of micro-texture diameter on anti-friction performance was systematically investigated. Surface modification treatment has significantly enhanced the hardness and roughness of the samples by several times and greatly improved the wetting performance. The contact angle decreased by approximately 56% (± 1.8%) after texturing treatment and further reduced by 16% (± 5.7%) after high-temperature oxidation. Friction test revealed that ceramic-textured specimens outperformed smooth surfaces in terms of friction reduction and wear resistance. Specifically, the friction coefficient was reduced by 25.29% (± 2.4%), with a maximum wear reduction rate of 27.7%. This study provides a novel strategy for improving the surface properties of Zr-based alloys.</p>

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Laser texturing and thermal oxidation: a dual surface engineering strategy boosting wear resistance of zirconium alloy

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Qingchun Zheng,
  • Jiachen Zhang,
  • Zhitao Cao,
  • Jiali Hao,
  • Ya Chen,
  • Chunqiu Zhang,
  • Yahui Hu

摘要

Zirconium (Zr)-based alloys have great potential for orthopedic implants due to their excellent mechanical properties, corrosion resistance, and biocompatibility. However, untreated Zr-based alloys exhibit inadequate wear resistance, which limits their service life as joint prostheses. This study employed a combined surface texturing and thermal oxidation approach to enhance wear resistance. Biomimetic micro-textures were fabricated on the alloy surface via laser processing, followed by high-temperature oxidation to produce a textured ceramic coating. The influence of micro-texture diameter on anti-friction performance was systematically investigated. Surface modification treatment has significantly enhanced the hardness and roughness of the samples by several times and greatly improved the wetting performance. The contact angle decreased by approximately 56% (± 1.8%) after texturing treatment and further reduced by 16% (± 5.7%) after high-temperature oxidation. Friction test revealed that ceramic-textured specimens outperformed smooth surfaces in terms of friction reduction and wear resistance. Specifically, the friction coefficient was reduced by 25.29% (± 2.4%), with a maximum wear reduction rate of 27.7%. This study provides a novel strategy for improving the surface properties of Zr-based alloys.