Catalyst element having a thermal barrier coating as the catalyst substrate
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United States of America Patent
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May 13, 2008
Grant Date -
Mar 27, 2003
app pub date -
May 30, 2002
filing date -
Sep 26, 2001
priority date (Note) -
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Abstract
A combustion catalyst coating (36) applied to the surface of a ceramic thermal barrier coating (34) which is supported by a metal substrate (32). The microstructure of the thermal barrier coating surface provides the necessary turbulent flow and surface area for interaction of the catalyst and a fuel-air mixture in a catalytic combustor of a gas turbine engine. The temperature gradient developed across the thermal barrier coating protects the underlying metal substrate from a high temperature combustion process occurring at the catalyst surface. The thermal barrier coating deposition process may be controlled to form a microstructure having at least one feature suitable to interdict a flow of fuel-air mixture and cause the flow to become more turbulent than if such feature did not exist.
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