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장중철(Jung-Chel Chang),장성용(Sung-Young Chang),김범수(Beom-Soo Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The Blade is typical hot gas part of gas turbine. especially 1st blade is operated severe environments which include both above 1300℃ high temperature gas and thermal stress by high speed rotation of 3600 rpm. To obtain high efficiency, thermal barrier coating(TBC) and internal cooling system have been used. In this study, we examined thermal barrier coating and base materials of 1st and 2nd blades to evaluate degree of degradation, and then investigate the type and cause of failure by degradation.