Bulletin of materials science | |
Pulse electrodeposition and corrosion properties of Ni�?�Si3N4 nanocomposite coatings | |
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 (ð¸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
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