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<p>To address the limitations of conventional titanium alloys such as Ti6Al4V in biomedical applications due to the presence of biotoxic elements, this study explores the fabrication of alloy coatings with varying Mo contents on Ti6Al4V substrates using broadband laser cladding techniques, with a focus on evaluating their corrosion resistance and biocompatibility. The microstructure, corrosion resistance, and biocompatibility of the coatings were characterized via x-ray diffraction&#xa0;(XRD), scanning electron microscopy (SEM), electrochemical analysis, cell culture experiments, and hydroxyapatite deposition assays. It is demonstrated that the incorporation of Mo facilitates the formation of a stable β-phase structure. Compared to the substrate, the coating enriched with 15 wt.% Mo exhibited the highest self-corrosion potential of − 0.694&#xa0;V, indicating superior corrosion resistance and significantly enhanced bioactivity, as evidenced by the accumulation of hydroxyapatite on the coating, thereby confirming its outstanding osteogenic potential. Consequently, the Ti-Nb-Mo alloy coatings synthesized via broadband laser cladding techniques exhibit promising comprehensive properties, expanding the application scope of titanium alloys in the biomedical field.</p>

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Enhancing Corrosion Resistance and Biocompatibility of Ti-Nb-Mo Alloy Coatings on Ti6Al4V Substrate via Laser Cladding

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Jiangmei Liu,
  • Chi Pang,
  • Peng Xu,
  • Na Xu,
  • Long Li

摘要

To address the limitations of conventional titanium alloys such as Ti6Al4V in biomedical applications due to the presence of biotoxic elements, this study explores the fabrication of alloy coatings with varying Mo contents on Ti6Al4V substrates using broadband laser cladding techniques, with a focus on evaluating their corrosion resistance and biocompatibility. The microstructure, corrosion resistance, and biocompatibility of the coatings were characterized via x-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical analysis, cell culture experiments, and hydroxyapatite deposition assays. It is demonstrated that the incorporation of Mo facilitates the formation of a stable β-phase structure. Compared to the substrate, the coating enriched with 15 wt.% Mo exhibited the highest self-corrosion potential of − 0.694 V, indicating superior corrosion resistance and significantly enhanced bioactivity, as evidenced by the accumulation of hydroxyapatite on the coating, thereby confirming its outstanding osteogenic potential. Consequently, the Ti-Nb-Mo alloy coatings synthesized via broadband laser cladding techniques exhibit promising comprehensive properties, expanding the application scope of titanium alloys in the biomedical field.