Synthesis of nanocrystalline Fe–Co and Fe–Co–TiO 2 ferromagnetic coatings obtained by pulse electrodeposition

This research is concentrated on evaluating the relationship between pulse current density with microstructure, tribological behavior, and magnetic properties of nanocrystalline Fe–Co and Fe–Co–TiO2 ferromagnetic coatings. The results indicated that the higher current density led to increase in microhardness of the Fe–Co–TiO2 composite coatings to about 628 HV. Also, the higher current density caused to improve the wear resistance, so that the average friction coefficient and wear rate of Fe–Co–TiO2 composite were decreased to 0.54 and 0.46 × 10–3 mg/N m, respectively. Vibrating sample magnetometer measurements demonstrated that as the deposition current density was increased, the saturation magnetization (Ms) and coercivity (Hc) were decreased. Moreover, Ms and Hc related to Fe–Co–TiO2 coatings were lower than those of the Fe–Co coatings. The highest Ms and lowest Hc corresponding to the electrodeposition coatings were obtained at a pulse current density of 100 mA/cm2.