Thermal Shock Fracture of Ceramic Disk under Rapid Heating

Thermal shock fracture resistance on several kinds of ceramics was evaluated by the rapid heating thermal shock test using disk specimens. The thermal shock resistance parameter Rc=σF/Eα (σF: Thermal fracture strength, E: Young's modulus, α: Thermal expansion coefficient) was obtained by measuring the temperature distributions in the disk at the fracture. The measured thermal shock resistance parameter Rc was compared with other thermal shock test data including water quenching test. Compatible data were obtained regardless of the difference between heating test or quenching test.