FORMATION OF NI-SB PHASES BY ELECTRO-CODEPOSITION DIFFUSION COATING

Abstract

Electrodeposited metal matrix/metal particle composite coatings (EMMC’s) were deposited, heat treated and characterized. Nickel matrix/ antimony particulate coatings deposited on Inconel 600 substrate (Ni-base superalloy) was chosen as a model system. The microstructure of the plated and heat treated coatings was characterized using light optical microscope (LOM) and X-ray diffraction analysis (XRD).Results showed that Ni5Sb2, Ni3Sb, and NiSb phases are presented in the coated layer. Further NiSb is a good source for Sb2O4 compound formation under open heating. This oxide has good stability at high temperatures.