Abstract
In order to apply the maximum thermal stress equation to water-quenching thermal shock tests of ceramics in practice, a novel method for evaluating the heat transmission behaviour and measuring the effective heat transfer coefficient was proposed. Zirconia ceramic, whose heat conductivity does not change over a wide temperature range, was used for the study. In this experiment, the change of temperature at two different positions in the specimen was measured after water quenching. The dependences of heat transmission behaviour on time and surface temperature were discussed. The present method made it possible to obtain the effective heat transfer coefficient data which clarify the relationship between the intrinsic properties of ceramics and the critical quenching temperature difference.
