METHOD OF ESTIMATING MATERIAL PROPERTY VALUE OF CERAMIC

摘要

Provided is a method of estimating, in a short time with satisfactory precision, the values of material properties, in particular, Young's modulus and thermal conductivity, of a ceramic layer of a heat-insulating coating material formed on a high-temperature member.  The method of estimating the values of material properties of a ceramic comprises: a step in which the Larson-Miller parameter of the ceramic is calculated from the time periods over which the ceramic was heated and from the temperatures at which the ceramic was heated; a step in which that porosity of the ceramic which corresponds to the calculated Larson-Miller parameter is obtained from the calculated Larson-Miller parameter and from a correlation diagram concerning Larson-Miller parameter and porosity obtained from a sample material having the same composition as the ceramic; and a step in which that value of a property of the ceramic which corresponds to the porosity obtained is obtained from the porosity obtained and from a correlation diagram concerning porosity and the property, the diagram having been obtained from the sample material having the same composition as the ceramic.