Microstructure of Aluminide Coatings Modified by Pt, Pd, Zr and Hf Formed in Low-Activity CVD Process

In the present article doping of aluminide coatings by Pt/Pd as well Hf or Pd using industrial processes was developed. The different combinations elements were tested their influence on chemical composition initially investigated. Pt and both + electroplated surface MAR M247 nickel superalloy. Zr doped during low activity CVD aluminizing process Bernex BPX Pro 325S system. conducted research showed that formed (Ni, Pd, Pt) Al solid solution in outer additive layer. higher concentration palladium near whole layer detected. platinum presented below coating. detected mainly diffusion zone. (about 0.1 wt.%) zone observed. hafnium but a small this element measured. obtained results formation three (Pd, modified coating proposed technology is possible. structure all typical for low-activity, high temperature (LAHT) outward Ni from base material.