Thermal shock resistance (TSR) and Thermal fatigue resistance (TFR) of refractory materilas

N. RENDTORFF (1); AGLIETTI E F

Thermal stress resistance, experimental methods

Springer

Año: 2013; p. 5119 - 5128

  Refractories are defined as "non-metallic materials having those chemical and physical properties that make them applicable: for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)" [1-2]. Refractory materials are used in linings for furnaces, kilns, incinerators and reactors. They are also used to make crucibles and vessels that contain molten metals. Refractory materials must be chemically and physically stable at high temperatures. They must retain their high strength in these conditions also. Depending on the operating environment, they need to be chemically inert, and/or have specific ranges of thermal conductivity and of the coefficient of thermal expansion resistance; finally, in certain applications, they must be resistant to thermal shock stresses consequence of sudden changes in temperature. The current goal of thermal shock testing continues to be the generation of quantitative results that clearly indicate the resistance of a refractory product to damage or the degradation after exposure to one or more controlled temperature cycles (heating and cooling). There is still no consensus regarding ?the ideal thermal shock test? for all refractory products, because of the large number and diversity, the complexity of their structure, and the wide range of applications