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<p>The current study investigated the synthesis of pure Ni, Ni-ZrO<sub>2</sub>, and Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites using ultrasonic pulse electrodeposition. The study focused on evaluating their mechanical properties, surface characteristics, wear performance, and corrosion resistance. The findings revealed that pure Ni composites demonstrated coarse particles with an irregular structure. However, the Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites revealed the most compact, uniform, and refined microstructure among the three, with average grain sizes of 67.9&#xa0;nm for Ni and 20.8&#xa0;nm for ZrO<sub>2</sub>/CeO<sub>2</sub> nanoparticles. The microhardness measurements revealed high values for all composites, with pure Ni, Ni-ZrO<sub>2</sub>, and Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites respectively averaging 375.4, 430.1, and 525.9 Hv. Moreover, the Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites demonstrated improved tribological performance, maintaining a low friction coefficient of approximately 0.31. The worn mass loss comparison showed that pure Ni composites had the 34.55&#xa0;mg/m<sup>2</sup> highest average mass loss, whereas Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites demonstrated the minimal average mass loss, at 14.87&#xa0;mg/m<sup>2</sup>. In a 3.5 wt.% solution of NaCl, the Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> nanocomposites revealed outstanding corrosion resistance, sustaining minimal damage and achieving the 0.06&#xa0;mm/year lowest corrosion rate among the composites. The addition of ZrO<sub>2</sub> and CeO<sub>2</sub> nanoparticles in the Ni-ZrO<sub>2</sub>-CeO<sub>2</sub> composite refined the grain structure and promoted a uniform, densely packed microstructure, significantly improving corrosion resistance upon comparison with pure Ni and Ni-ZrO<sub>2</sub> composites. These results underline the potential of UPE for fabricating high-performance nanocomposites with advanced properties for various technological applications.</p>

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Microstructure and Performances of Ni-ZrO2-CeO2 Nanocomposites via Ultrasonic Pulse Electrodeposition

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • Yunwei Zhu,
  • Lixin Wei

摘要

The current study investigated the synthesis of pure Ni, Ni-ZrO2, and Ni-ZrO2-CeO2 nanocomposites using ultrasonic pulse electrodeposition. The study focused on evaluating their mechanical properties, surface characteristics, wear performance, and corrosion resistance. The findings revealed that pure Ni composites demonstrated coarse particles with an irregular structure. However, the Ni-ZrO2-CeO2 nanocomposites revealed the most compact, uniform, and refined microstructure among the three, with average grain sizes of 67.9 nm for Ni and 20.8 nm for ZrO2/CeO2 nanoparticles. The microhardness measurements revealed high values for all composites, with pure Ni, Ni-ZrO2, and Ni-ZrO2-CeO2 nanocomposites respectively averaging 375.4, 430.1, and 525.9 Hv. Moreover, the Ni-ZrO2-CeO2 nanocomposites demonstrated improved tribological performance, maintaining a low friction coefficient of approximately 0.31. The worn mass loss comparison showed that pure Ni composites had the 34.55 mg/m2 highest average mass loss, whereas Ni-ZrO2-CeO2 nanocomposites demonstrated the minimal average mass loss, at 14.87 mg/m2. In a 3.5 wt.% solution of NaCl, the Ni-ZrO2-CeO2 nanocomposites revealed outstanding corrosion resistance, sustaining minimal damage and achieving the 0.06 mm/year lowest corrosion rate among the composites. The addition of ZrO2 and CeO2 nanoparticles in the Ni-ZrO2-CeO2 composite refined the grain structure and promoted a uniform, densely packed microstructure, significantly improving corrosion resistance upon comparison with pure Ni and Ni-ZrO2 composites. These results underline the potential of UPE for fabricating high-performance nanocomposites with advanced properties for various technological applications.