Aluminide coatings fabricated on nickel by aluminium electrodeposition from DMSO2-based electrolyte and subsequent annealing

Abstract

A new cost-effective process to fabricate aluminide coatings was developed. Coating layers consisting of nickel aluminides could be formed by electrodeposition of Al layers from a dimethylsulfone-AlCl3 electrolyte on Ni substrates and subsequent annealing in air or vacuum at temperatures of 700-1150°C. Analysis of the intermetallic layers by XRD, SEM and EDX indicated the formation of Al3Ni and Al3Ni 2 at 700°C, AlNi at 900°C and 1000°C, and AlNi and AlNi3 at 1150°C. The Annealing atmosphere did not affect the resulting intermetallic products. © 2011 The Japan Institute of Metals.