Method for estimating physical property of ceramic, method for estimating physical property of thermal barrier coating, method for estimating remaining lifetime of thermal barrier coating, method for estimating remaining lifetime of high-temperature member, and physical property acquiring apparatus
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United States of America Patent
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Feb 5, 2013
Grant Date -
Aug 26, 2010
app pub date -
Mar 13, 2009
filing date -
Mar 26, 2008
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Abstract
A method by which physical properties, including the Young's modulus and thermal conductivity of a ceramic layer of a thermal barrier coating formed on a high-temperature member, are quickly and accurately estimated. A method for estimating a physical property of a ceramic includes a step of calculating the Larson-Miller parameter from the time for which and the temperature at which the ceramic is heated; a step of acquiring the porosity of the ceramic corresponding to the calculated Larson-Miller parameter, based on the calculated Larson-Miller parameter and a diagram correlating the Larson-Miller parameter and the porosity obtained from samples having the same composition as the ceramic; and a step of acquiring the physical property of the ceramic corresponding to the acquired porosity, based on the acquired porosity and a diagram correlating the porosity and the physical property obtained from samples having the same composition as the ceramic.
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