Effect of codeposition of mixed nanoparticles (V2O5 and ZrO2) on the structure and properties of Ni-B nanocomposite coating

• Published in: Journal of alloys and compounds 2018-07, Vol.752, p.253-259
• Main Authors: Waware, Umesh Somaji, Hamouda, A.M.S., Pradhan, Ajaya Kumar
• Format: Article
• Language: English
• Subjects: Aqueous electrolytes; Clusters; Coating; Codeposition; Direct current; Electrochemical analysis; Hybrid composites; Hybrid nanocomposite; Hybridization; Modulus of elasticity; Morphology; Nano-mechanical; Nanocomposites; Nanoparticles; Nanostructured materials; Ni-B-V2O5/ZrO2; Polarization; Properties (attributes); Protective coatings; Surface roughness; Vanadium pentoxide; Zirconium dioxide
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2018.04.088

In the present research, Ni-B-V2O5/ZrO2 hybrid composite coating is prepared from an aqueous electrolyte using direct current. The properties of the hybrid composite is compared to that of the Ni-B coating in order to highlight the benefits of the addition of the two different nano-particles (V2O5 and ZrO2) into the Ni-B coating matrix. The incorporation of the mixed nano-particles is observed to significantly affect the structure, nano-mechanical and electrochemical properties of the coating. It has been observed to increase the crystallinity of the Ni-B coating. The surface morphology of the Ni-B-V2O5/ZrO2 coating and that of the Ni-B coating is observed to be consisting of similar type of grain clusters. However, in the case of the Ni-B-V2O5/ZrO2 composite coating, the clusters are observed to be smaller in size with occasional protrusion. The overall surface roughness of the Ni-B-V2O5/ZrO2 is observed to be higher than that of the Ni-B coating because of the protrusions. The hardness and the elastic modulus of the Ni-B-V2O5/ZrO2 hybrid composite are observed to be almost 170% and 70% more than that of the Ni-B nanocomposite coating. The protectiveness provided by the Ni-B-V2O5/ZrO2 is observed to be better than that of the Ni-B coating by more than three times. [Display omitted] •Significant changes in structure and properties are observed.•The crystallinity and the surface irregularity are observed to increase.•The surface morphology is observed to become rough and cauliflower type.•Hardness and the elastic modulus are observed improve significantly.•Corrosion resistance is observed to improve by more than three times.