• Ghalayani Esfahani, Arash

Abstract

<jats:p>To the best of our knowledge, this work presents the first successful effort to fabricate and study nanostructured Ni-based composite coatings using the electrophoretic deposition method with nanostructured SiO<jats:sub>2</jats:sub> particles. In this work, Ni/SiO<jats:sub>2</jats:sub> nanoparticle composite coatings were prepared by electrophoretic deposition (EPD) [ and their hardness, wear and corrosion resistances [ were examined. After studying the morphology of the coatings and finding the optimum conditions for uniform coating, in order to improve the mechanical properties as well as resistance to corrosion, sintering was performed. The Ni/SiO<jats:sub>2</jats:sub> nanocomposite coatings show excellent hardness (~376 HV), reduced Youngs modulus (~180 GPa), contact stiffness (~110 μN/Nm) as well as the wear and corrosion resistances which are considered in the different SiO<jats:sub>2</jats:sub> concentrations and particle sizes. In addition, by controlling the size of the SiO<jats:sub>2</jats:sub> particles, in optimum coating voltage and proper time duration, hardness and wear resistance of nanocomposite coatings were controlled.</jats:p>

Topics

• nanoparticle
• Deposition
• nanocomposite
• corrosion
• wear resistance
• hardness
• sintering