Ceramic nanocomposite by electrodeposition of nickel into porous alumina matrix

This paper reports a process of electrodeposition of Ni into porous alumina matrix. In the proposed process, porous alumina membrane with cross linked networks was fabricated using colloidal powder processing and pressureless sintering. The dispersion conditions of aqueous alumina nanopowder suspensions were obtained by optimizing both the pH and dispersant concentration. The optimal pH of the suspension is found to be 7 and the amount of dispersant is 12 mg/g of alumina powder. Alumina green parts were sintered at 1200°C to obtain porous alumina matrix. Ni was deposited into the porous alumina compacts. The experimental results show that Ni nanoparticles are uniformly dispersed in the porous membrane during the electrodeposition process.