MULTI-LAYER COATING WITH DIFFUSION BARRIER LAYER AND EROSION RESISTANT LAYER

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A multi-layer coating for a surface of an article comprising a diffusion barrier layer and an erosion resistant layer. The diffusion barrier layer may be a nitride film including but not limited to TiNx, TaNx, Zr3N4, and TiZrxNy. The erosion resistant layer may be a rare oxide film including but not limited to YF3, Y2O3, Er2O3, Al2O3, ZrO2, ErAlxOy, YOxFy, YAlxOy, YZrxOy and YZrxAlyOz. The diffusion barrier layer and the erosion resistant layer may be deposited on the articles surface using a thin film deposition technique including but not limited to, ALD, PVD, and CVD.