Author(s)

Z Veselý, J Kuneš, M Honner & J Martan

Abstract

Thermal barriers (TB) protect material against high temperatures and thermal shocks. The effect of various TB - substrate structures to their dynamic behaviour under the thermal shock is studied. The TB parameters such as number of individual layers, their thicknesses and porosities and thermal and mechanical properties of their materials have been investigated. Temperature measurement on the experimental samples has been done both during the plasma spraying and thermal loading. Indirect thermal problems have been solved to determine the effect of TB’s. The simulation model has been compared with the temperature measurement on selected TB’s structures. Simple model in the form of criteria1equation has been constructed in order to control the TB deposition process. The presented results confirm the importance of TB’s as a dynamic material protection against the thermal overloading.

Keywords