Thermal Shock Test Ceramics

The transition between temperature extremes occurs very rapidly greater than 15 c per minute.

Thermal shock test ceramics.

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. At present the research of thermal shock resistance on ceramic material is mostly concentrating on the determination of critical temperature differences thermal shock cycles residual strength. Thermal shock testing exposes products to alternating low and high temperatures to accelerate failures caused by temperature cycles or thermal shocks during normal use. 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.

It is fairly easy to test ceramic items for their ability to resist the thermal shock to which they are likely to be exposed. The thermal shock and thermal fatigue behaviour of ceramic materials has been determined with a new type of testing system 3. Practical experience has shown that thermal shock tests do not lead to generally useful test data.