In 792 Substrate

CoCrAlY BONDCOAT

(REFERENCE 10)

Figure 8. Microstructure of PVD Zirconia Coating Can be Tailored with Biased and Unbiased Deposition.

Zr02 ' 20Y203 COATING

Figure 8. Microstructure of PVD Zirconia Coating Can be Tailored with Biased and Unbiased Deposition.

of stabilized zirconia can be inhibited when the stabilizing element has a microscopically homogeneous distribution. Homogeneous distribution of stabilizing elements in the zirconia is promoted by vapor phase alloying, which is characteristic of all PVD processes. Consequently, dense PVD coating surfaces are expected to enhance the stability of the zirconia when highly corrosive salt films are present.

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