Method for improving the TBC life of a single phase platinum...

Details Method for improving the TBC life of a single phase platinum... Method for improving the TBC life of a single phase platinum...

2005-04-19

2005-04-19

Meeks, Timothy (Department: 1762)

Coating processes

Direct application of electrical, magnetic, wave, or...

Electromagnetic or particulate radiation utilized

C427S252000, C427S253000, C427S255190, C427S327000, C148S276000, C148S277000, C148S284000, C148S285000, C205S149000, C205S228000, C205S264000

Reexamination Certificate

active

06881452

ABSTRACT:
A thermal barrier coating system having an improved life as a result of a preoxidation treatment applied to a single phase platinum aluminide bond coat. After coating the substrate to form a diffusion platinum aluminum bond coat, the surface finish of the bond coat was grit blasted with an inert grit of preselected size at a preselected pressure to achieve a predetermined surface finish. After the grit blasting, but before application of the ceramic top coat of yttria-stabilized zirconia (YSZ), the coating was preoxidized to form a thin alumina scale by heat treating the diffusion platinum aluminide bond coat at an elevated temperature at a preselected partial pressure of oxygen.

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