Thermal Shock Testing 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 testing ceramics.

The transition between temperature extremes occurs very rapidly greater than 15 c per minute. Ceramic is hard and resistant to abrasion but it is brittle and propagates cracks readily. 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.

Thin circular disks are heated up to 1750 k with a tungsten halogen lamp yielding heating rates up to 1200 k s. 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.