MICROSTRUCTURE AND PROPERTIES OF THE Ni-TiN NANOCOATINGS PREPARED BY COMPUTER-CONTROLLED PULSED ELECTRODEPOSITION TECHNIQUE

Abstract

This paper discusses the synthesis and characterization of Ni-TiN nanocoatings prepared by computer-controlled pulsed electrodeposition method. The influence of plating parameters on the microstructure, microhardness, and properties of the coating was investigated using transmission electron microscopy, atomic force microscopy, X-ray diffraction spectroscopy, scanning electron microscopy, and friction wear testing technique. The results showed that the Ni-TiN nanocoating synthesized at 4[Formula: see text]A/dm2 current density exhibited an optimum microhardness and TiN content of 984.7[Formula: see text]HV and 8.69[Formula: see text]wt.%, respectively. Ni-TiN nanocoatings prepared at different pulse frequencies grew as face-centered cubic structures along different directions, and average grain diameters of Ni and TiN in the nanocoating prepared at 200[Formula: see text]Hz were 87.2 and 34.6[Formula: see text]nm, respectively. The nanocoating prepared at 20% duty cycle showed an optimum microhardness and average wear of 980[Formula: see text]HV and 7.56[Formula: see text]mg/mm2.