Abstract: Nanoparticle reinforced nickel matrix composite (n-Al2O3/Ni) coatings were fabricated by electrobrush plating technique. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) techniques were employed to study the effects of the nano-particle on microstructure and properties of n-Al2O3/Ni composite coatings. It is revealed that the nano-particles disperse in the coatings evenly and take chemical bonds to the matrix (metal nickel). In fact, nano-particles enhance inhomogeneous nucleation of matrix during the composite formation by electrobrush plating, and refine the microstructure of the composite coatings. Nano-particles can obviously improve hardness and wear resistance of the electronbrush plated metal coatings. Compared with the nickel metal coatings, the hardness and wear resistance of n-Al2O3/Ni composite coatings increase by 0.5 times and 1.5 times, respectively. Microstructure characteristics properly elucidate the effect and mechanism of nano-particle improving properties of the electrobrush plated coatings.
Effects of nano-particles on microstructure and properties of electrobrush plated nickel coating
Abstract:
Nanoparticle reinforced nickel matrix composite (n-Al2O3/Ni) coatings were fabricated by electrobrush plating technique. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) techniques were employed to study the effects of the nano-particle on microstructure and properties of n-Al2O3/Ni composite coatings. It is revealed that the nano-particles disperse in the coatings evenly and take chemical bonds to the matrix (metal nickel) . In fact, nano-particles enhance inhomogeneous nucleation of matrix during the composite formation by electrobrush plating, and refine the microstructure of the composite coatings. Nano-particles can obviously improve hardness and wear resistance of the electronbrush plated metal coatings. Compared with the nickel metal coatings, the hardness and wear resistance of n-Al2O3/Ni composite coatings increase by 0.5 times and 1.5 times, respectively. Microstructure characteristics properly elucidate the effect and mechanism of nano-particle improving properties of the electrobrush plated coatings.