Abstract
This paper presented an analysis of temperature/stress distributions in a stress-relief-type plate of functionally graded ceramic-metal-based materials and related results of thermal shock testing. The FGM disks with several gradual variations were fabricated using a powder stacking method and a pulse electric current sintering technique. Thermal shock tests on the FGM disks were performed as follows: The FGM circular disks were initially maintained at high temperature on the ceramic surface, and then cooled suddenly by cold water with constant velocity. The thermal shock resistance of the FGM was estimated using a critical temperature difference where cracks appeared on the ceramic surface. The results of the comparison of the analytical stresses and the critical temperature differences revealed that the stresses on the ceramic surface released significantly by the gradual variation of nickel across the thickness of the FGMs.