Method for designating a component having a heat insulation layer and for determining its operating time

摘要

To determine the working life or working temperature of a component (10), e.g. a turbine vane, with a thermal insulation layer (16) of a material (YSZ) composed of zirconium oxide (ZrO 2) stabilized with Yttrium oxide (Y 2O 3), the surface is visibly marked with at least one metal oxide. The surface of the YSZ material is observed at a temperature with a rapid or slow alteration of the YSZ grid parameters in the marked and unmarked zones for comparison with a calibration curve.