Experimental methods for determining thermal stability of high-temperature materials under dynamic and static thermal loading conditions are considered. Experimentally, thermal stability is characterized by the destructive temperature difference or critical (destructive) rate of change of the temperature field in the bulk or at the surface of the material. It is shown that, with the observance of special conditions, the thermal-shock method, based on sharp cooling of heated specimens in water, provides an acceptable destructive temperature difference for a particular material, in agreement with theory. At present, however, no unique method for experimental determination of the thermal stability of high-temperature materials has been developed. A route towards standardizing static methods for determining the destructive temperature difference is proposed.
Refractories and Industrial Ceramics – Springer Journals
Published: Feb 19, 2005
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