SPRAYED HAYNES 230 LAYER TO INCREASE SPALLATION LIFE OF THERMAL BARRIER COATING ON A GAS TURBINE ENGINE COMPONENT
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Apr 1, 2014
filing date -
Apr 1, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A technique for improving the thermal protection against oxidation for a component in a gas turbine engine, for example, blades, row 1 vanes and row 2 vanes. The technique includes spraying a thin layer of alloy 230 on a base substrate of the component at those locations on the component where thermal protection against oxidation is desired. A metal bond coat layer is then deposited on the alloy 230 layer and a thermal barrier coating is deposited on the bond coat layer. The chromium, molybdenum, iron and tungsten in alloy 230 provide superior oxidation resistance, and the addition of lanthanum in the alloy 230 helps tailor thermal expansion with the thermal barrier coating resulting in higher spallation life.
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