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Method for improving the tbc life of a single phase platinum aluminide bond coat by preoxidation heat treatment
Method for improving the tbc life of a single phase platinum aluminide bond coat by preoxidation heat treatment
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机译:通过预氧化热处理提高单相铝化铂粘结涂层的tbc寿命的方法
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摘要
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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