Authors: Suman Kalyan Das; Prasanta Sahoo
Addresses: Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India. ' Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India
Abstract: This paper presents an experimental study of fractal characteristics of the surface profile of electroless Ni-B coating and optimisation of coating parameters based on L27 Taguchi orthogonal design. Optimum coating parameter combinations are identified to yield the optimum (maximum) fractal dimension by Taguchi analysis so that a smoother coating surface is obtained. Bath temperature is found to be the most important coating parameter in controlling the fractal characteristics of Ni-B coatings. The interaction between reducing agent concentration and the nickel source concentration also has high contribution in controlling the fractal characteristics of Ni-B coating. The coating is characterised for its microstructure and composition by scanning electron microscopy, X-ray diffraction analysis and energy dispersive X-ray analysis.
Keywords: electroless coatings; Ni-B coatings; nickel boron; Taguchi methods; optimisation; orthogonal arrays; fractal; coating parameters.
International Journal of Computational Materials Science and Surface Engineering, 2011 Vol.4 No.4, pp.326 - 346
Received: 19 Jul 2010
Accepted: 08 Jul 2011
Published online: 11 Jan 2015 *