Articles you may be interested inThermal stability and thermo-mechanical properties of magnetron sputtered Cr-Al-Y-N coatings A modified two-layer thermal barrier coating (TBC) was studied. In this work, the vacuum plasma sprayed Co-29Cr-6Al-l Y bond coat (first layer) received a pack aluminizing treatment prior to deposition of the air plasma sprayed Zr0 2 -8-wt. % Y 203 top coat (second layer). The effects of this treatment on the properties of plasma sprayed thermal barrier coatings were evaluated by thermal cyeing tests in air within the temperature range from 1000 to 1150 0e.Results of experiments showed that the performance of TBC can be improved by the prior aluminizing treatment on Co-29Cr-6AI-IY bond coat. This treatment was found to be very effective in reducing the oxidation rates of the bond coat. The fractographic analyses were also conducted on the spalled specimens to elucidate the performance improving mechanisms ofTBC effected by the attempted prealuminizing treatment on the bond coat.
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