Pt-plating effect on La-TZM alloy high temperature oxidation behavior

Abstract Pt coating on La-TZM alloys can effectively hinder the matrix alloy oxygen corrosion during high temperature oxidation processes. Doping powder metallurgy was used to prepare La-TZM alloy plates (doped with lanthanum), and electroplating was utilized to deposit a platinum coating on the plate surface. After high temperature treatment of the Pt-coated La-TZM alloy samples at different times and temperatures, scanning electron microscopy and energy dispersive spectra analysis of the sample surface and cross-sections were performed to observe the microstructure and composition changes. Differential thermal analysis of the Pt-coated La-TZM alloy specimens after high temperature treatment was performed to assess the high temperature oxidation resistance of the coated matrix alloy. The results show that the oxidation resistance of the TZM alloy can be enhanced, expanding its temperature application range.