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Multilayered Pt/Ru modified aluminide coating for thermal barrier coating(TBC) systems has been investigated.2 μm Pt+2 μm Ru+2 μm Pt was first deposited on nickel-base superalloy DZ125 by electrodeposition,and then the coating was treated by annealing and a conventional pack-cementation aluminizing process.The cyclic oxidation tests were carried out at 1423 K in air.It was found that the thermal cyclic oxidation resistance of Pt/Ru-modified aluminide coating was comparable to that of Pt-modified aluminide coating,which was much better than simply aluminized DZ125.The addition of Ru to Pt-modified aluminide coating increased the resistance to rumpling.The microstructures and phase constitutions of the coating before and after oxidation were investigated.
Multilayered Pt / Ru modified aluminide coating for thermal barrier coating (TBC) systems has been investigated 2 μm Pt + 2 μm Ru + 2 μm Pt was first deposited on nickel-base superalloy DZ125 by electrodeposition, and then the coating was treated by annealing and a conventional pack-cementation aluminizing process. The cyclic oxidation tests were carried out at 1423 K in air. It was found that the thermal cyclic oxidation resistance of Pt / Ru-modified aluminide coating was comparable to that of Pt-modified aluminide coating, which was much better than simply aluminized DZ125. The addition of Ru to Pt-modified aluminide coating increased the resistance to rumpling. microstructures and phase constitutions of the coating before and after oxidation were investigated.