Electrolytic Co-deposition of Ni-CrAlY Composite Coatings Using Different Deposition Configurations

Abstract

With the aim of seeking an alternative low-cost process for the fabrication of MCrAlY coatings, an electrolytic co-deposition process was employed to form a composite coating consisting of a Ni matrix and CrAlY particles. Three configurations were investigated in the co-deposition process, including a vertical setup, a horizontal arrangement, and a rotating barrel. The CrAlY volume fractions in the resultant composite coatings were compared. The advantages and disadvantages of each configuration were discussed. Among the three configurations studied in this paper, the rotating barrel demonstrated the best overall performance, with the capability of producing coatings with more uniform CrAlY particle incorporation of up to 40 vol.%.

Keywords:

• Barrel
• Coating
• Co-deposition
• Composite
• Electrodeposition
• MCrAlY
• Plating
• Sediment