Method for elongating the cyclical lifespan of heat attenuation layers, in particular on gas turbine components

摘要

A cyclic service of the thermal barrier coating is extended by increasing and/or long term stabilizing a strain tolerance of the thermal barrier coating. The coating is made of yttrium-stabilized zirconia or related chemical composition, which has been applied to substrate with oxidizing bond coat. The strain tolerance is increased or stabilized by weakening thermal barrier coating punctiform contact locations that bridge micro-crack flanks in the thermal barrier coating, and by decomposing silicon dioxide and sinter-active oxidic impurities contained in the coating.