Thermal Fatigue Characteristics of the Membrane Formed by the Plasma Spraying of ZrO₂-NiCrAIY

This paper focuses on the mechanism responsible for crack expansion and contraction: the behavior of cracks in the ceramic bed of zirconium dioxide membranes formed by plasma spraying, and the thermal stresses caused by differences in thermal expansion factors between the base material and sprayed bed, under a thermally cyclic environment. The test sample was prepared by spraying NiCrAlY on a stainless-steel base material to form a substrate membrane, then covering it with sprayed 8YSZ (zirconium dioxide-type ceramic). To clarify the self-recoverability of fatigue cracks caused during the thermal cycle, membrane cracking and crack expansion/contraction is studied. Paper includes a German-language abstract.