Bond or overlay MCrAIY-coating

摘要

It is disclosed a bond or overlay MCrAlY-coating for the use within a high temperature environment for the protection of the base alloy of turbine blades and vanes. The MCrAlY-coating having a gamma or gamma/gamma'-structure comprises a dispersion of beta-NiAl and/or y/beta-MCrAlY particles. This provides a reservoir of aluminum reservoir to coatings wherein the reservoir replenish the aluminum lost due to oxidation and interdiffusion during service. The beta-NiAl and/or y/beta-MCrAlY is the aluminum reservoir and is applied by mixing appropriate powders with gamma or gamma/gamma' powders.