Thermal Fatigue Test of Ceramics by Ring Test

Abstract

In the present paper, an experimental method of testing multicycle fatigue of ceramics was investigated. When the inner surface of a ring is heated by a constant heat flux, the resulting thermal stress can be easily estimated. By using this merit, the relation between the thermal stress and the fracture time of some ceramics was measured. A nearly linear relation was obtained when the data were plotted on a log-log graph paper. The technical meaning of the slope of the line was also considered.