Thermal Shock Test Ceramics

This is probably due to the fact that thermal shock failure is a complicated function of the external thermal shock conditions and of the temperature functions of five different material properties.

Thermal shock test ceramics.

The transition between temperature extremes occurs very rapidly greater than 15 c per minute. The thermal shock of ceramic materials is influenced by many factors such as strength young s modulus fracture toughness thermal conductivity and thermal expansion coefficient. The thermal shock and thermal fatigue behaviour of ceramic materials has been determined with a new type of testing system 3. As whisker reinforced silicon nitrides can show an improvement in room temperature strength and fracture toughness one would expect that these cmcs will also possess increased thermal shock resistance.

It is fairly easy to test ceramic items for their ability to resist the thermal shock to which they are likely to be exposed. Thermal shock testing exposes products to alternating low and high temperatures to accelerate failures caused by temperature cycles or thermal shocks during normal use. Practical experience has shown that thermal shock tests do not lead to generally useful test data.