Abstract
Al2O3/YSZ double layer TBCs dispersed with Pt particles were prepared by cathode plasma electrolytic deposition (CPED) on the high temperature alloy (0.1%C, 12% Co, 6.5% Cr, 6.2% Al, 5% W, 1% Mo, 1.5% Hf, 6.5% Ta, 0.01% B, balance Ni, wt%). High temperature cyclic oxidation at 1100°C, hot corrosion at 900°C and thermal insulation tests at 1100°C were adopted to investigate the high temperature corrosion resistance of the coating. It is revealed that the mechanical property of composite coating is improved by the toughening effects of Pt particles. The Al2O3/YSZ double layer coatings dispersed with Pt possess well oxidation resistance and hot corrosion resistance, due to low oxygen diffusion rate and chemically inertness of the Al2O3 layer.
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