《Table 2 EDS analysis of coating (wt%)》

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《Si对MCrAlY涂层微观结构及性能的影响（英文）》

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The oxidation and corrosion resistance of MCr Al Y coatings is related mostly to the dense oxide film formed by Al2O3 and Cr2O3 on the coating surface.These oxide films can act as an oxygen barrier layer or a shielding layer to prevent further oxidation and corrosion of the substrate.The phase constitution of MCr Al Y coatings mainly includes matrix phase andβ-Ni Al or Co Al intermetallic compound.By the formation of Al2O3 film，and thermally grown oxide（TGO），Al content of theβphase decreases at high temperature，and then changes to aγ’strengthening phase.Oxidation resistance of the bond layer decreases，as theβphase vanishes.Therefore，the volume content ofβphase and its distribution is an important criterion for evaluating the oxidation resistance of MCr Al Y coating[16，17].The EDS analytical results on the coatings with Si addition of 2%and 5%are shown in Table 2.