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09229 Synthesis and Characterisation of Ni-Al2O3 Composite coating by Electrodeposition Method

Picture for 09229 Synthesis and Characterisation of Ni-Al2O3 Composite coating by Electrodeposition Method
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Product Number: 51300-09229-SG
ISBN: 09229 2009 CP
Author: Pallav Bhadauria, Venkatraman Hariharan and Dhanashree Aole
Publication Date: 2009
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Dispersion strengthened Nickel- alumina composite was fabricated by electro-deposition method on a non-metallic substrate with the help of nickel-sulphamate bath. The fine particles of alumina were dispersed and vigorously stirred in the bath in order to get uniformly into the Ni-matrix. The influencing parameters i.e. current density, pH, and temperature of the electrolyte were varied to study the effect on the composite quality.

The Ni-alumina dispersion strengthened composite was fabricated by optimizing the parameters like current density, temperature, pH of the electrolyte etc. of the sulphamate bath. The composite coatings were characterized pertaining to physical appearance, microstructure, hardness and thickness. The obtained results indicate that the micro-structural refinement of the Ni- matrix and uniformity of distribution of oxide particles is obtained by choosing the small size of (less than 5 µm) particles. Also the results indicate increase in the hardness of the Ni-matrix after dispersion of the oxide particles.

Keywords: Nickel sulphamate solution, electro-deposition method, Nickel coating, alumina particles dispersion, and dispersion strengthening effect
Dispersion strengthened Nickel- alumina composite was fabricated by electro-deposition method on a non-metallic substrate with the help of nickel-sulphamate bath. The fine particles of alumina were dispersed and vigorously stirred in the bath in order to get uniformly into the Ni-matrix. The influencing parameters i.e. current density, pH, and temperature of the electrolyte were varied to study the effect on the composite quality.

The Ni-alumina dispersion strengthened composite was fabricated by optimizing the parameters like current density, temperature, pH of the electrolyte etc. of the sulphamate bath. The composite coatings were characterized pertaining to physical appearance, microstructure, hardness and thickness. The obtained results indicate that the micro-structural refinement of the Ni- matrix and uniformity of distribution of oxide particles is obtained by choosing the small size of (less than 5 µm) particles. Also the results indicate increase in the hardness of the Ni-matrix after dispersion of the oxide particles.

Keywords: Nickel sulphamate solution, electro-deposition method, Nickel coating, alumina particles dispersion, and dispersion strengthening effect
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