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<p>To enhance the properties of CuSn12Ni2 coating, e.g. wear and corrosion resistance etc., this study proposed a composite coating, reinforced CuSn12Ni2 with different percentage of nano-tungsten carbide (WC), fabricated by dual-laser technique. By coupling lasers of different wavelength, the microstructure and other properties, such as hardness and wear resistance, exhibited pronounced enhancements, while simultaneously, achieve the uniform distribution of nano particles. The formation of hard carbides from the partial decomposition of nano-WC effectively hindered dislocation motion, resulting in 50.48% increase in microhardness. Meanwhile, based on the inhibition of plastic deformation and the promotion of protective oxide film formation by nano-WC particles, the wear loss of CuSn12Ni2 decreased by 84.51%. Notably, the 8 wt% WC/CuSn12Ni2 composite coatings demonstrated the best corrosion performance, with the corrosion potential elevated by 0.448&#xa0;V versus the saturated calomel electrode (SCE), polarization resistance increased by 76451.8 Ω·cm², and corrosion current density reduced by 5.254 µA /cm² compared to the raw material. These results highlight that the excellent incorporation of nano-WC, fabricated with dual-laser technique, effectively optimize the comprehensive performance of CuSn12Ni2 coatings, offering promising potential for applications in harsh and high-load environments.</p>

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Enhancing properties of tin-nickel bronze by reinforcing with Nano-WC via dual-laser processing technique

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Xiaohua Wang,
  • Yumeng Lu,
  • Tiegen Liu

摘要

To enhance the properties of CuSn12Ni2 coating, e.g. wear and corrosion resistance etc., this study proposed a composite coating, reinforced CuSn12Ni2 with different percentage of nano-tungsten carbide (WC), fabricated by dual-laser technique. By coupling lasers of different wavelength, the microstructure and other properties, such as hardness and wear resistance, exhibited pronounced enhancements, while simultaneously, achieve the uniform distribution of nano particles. The formation of hard carbides from the partial decomposition of nano-WC effectively hindered dislocation motion, resulting in 50.48% increase in microhardness. Meanwhile, based on the inhibition of plastic deformation and the promotion of protective oxide film formation by nano-WC particles, the wear loss of CuSn12Ni2 decreased by 84.51%. Notably, the 8 wt% WC/CuSn12Ni2 composite coatings demonstrated the best corrosion performance, with the corrosion potential elevated by 0.448 V versus the saturated calomel electrode (SCE), polarization resistance increased by 76451.8 Ω·cm², and corrosion current density reduced by 5.254 µA /cm² compared to the raw material. These results highlight that the excellent incorporation of nano-WC, fabricated with dual-laser technique, effectively optimize the comprehensive performance of CuSn12Ni2 coatings, offering promising potential for applications in harsh and high-load environments.