Pulse electrodeposition and corrosion properties of Ni�?�Si3N4 nanocomposite coatings

Bulletin of materials science

G Paruthimal Kalaignan¹  S Kasturibai² 

[1] Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India$$Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, IndiaAdvanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India$$;Department of Chemistry, Alagappa Government Arts College, Karaikudi 630 003, India$$Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India$$Department of Chemistry, Alagappa Government Arts College, Karaikudi 630 003, IndiaDepartment of Chemistry, Alagappa Government Arts College, Karaikudi 630 003, India$$Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India$$Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, IndiaDepartment of Chemistry, Alagappa Government Arts College, Karaikudi 630 003, India$$Advanced Nanocomposite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India$$

关键词: Pulse electro deposition;    nanocomposite coating;    XRD;    SEM;    microhardness.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The development of modern technology requires metallic materials with better surface properties. In the present investigation; Si₃N₄-reinforced nickel nanocomposite coatings were deposited on a mild steel substrate using pulse current electrodeposition process employing a nickel acetate bath. Surface morphology, composition, microstructure and crystal orientation of Ni and Niâ€�?�Si₃N₄ nanocomposite coatings were investigated by scanning electron microscope, energy dispersive X-ray spectroscopy and X-ray diffraction analysis, respectively. The effect of incorporation of Si₃N₄ particles in the Ni nanocomposite coating on the micro hardness, corrosion behaviour has been evaluated. Smooth composite deposits containing well-distributed silicon nitride particles were obtained and the crystal grains on the surface of Niâ€�?�Si₃N₄ composite coating are compact. The crystallite structure was face centred cubic (ð‘�?�ð�?�ð�?��?) for electrodeposited nickel and Niâ€�?�Si₃N₄ nanocomposite coatings. The micro hardness of the composite coatings (720 HV) was higher than that of pure nickel (310 HV) due to dispersion-strengthening and matrix grain refining and increased with the increase of incorporated Si₃N₄ particle content. The corrosion potential (𝐸_corr) in the case of Niâ€�?�Si₃N₄ nanocomposite had shown a negative shift, confirming the cathodic protective nature of the coating.

【 授权许可】

Unknown