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Prediction of the thermal shock resistance of basic refractory materials using fracture resistance parameters

M.R.Izadpanah

Refractorymaterials are used in different industries. Knowledge of different properties of these materials is vital to the consumers and therefore the manufacturers hav to provide these properties.Among these thermal shock resistance is an essential property and ismeasured in terms of the number of cycles that a refractory material can withstand when subjected to standard conditions. This property is measured experimentally by varying the temperature in a known environment then the number of cycles the material withstands this treatment without spalling is a measure of its thermal shock resistance. Although this method of experimentation exists, but it is both expensive and time consuming. Various studies have been presented to predict this vital property, however, the range of applications are limited. The present study employs a test rig by which temperature distributions in magnesite samples are accurately measured. This information plus other results obtained from relevant tests on related properties are used to develop a model which predicts the number of quench cycles withstand by different samples when subjected to sudden temperature changes. The comparison of the theoretical values using the solution of the presented model with experimental data for different materials having different properties shows a close agreement.