Failure Analysis of Thermal Barrier Coating Area of Turbine Guide Blades Based on Oxidation and Sintering
Studying the impact of oxidation and sintering on the failure of thermal barrier coating areas of turbine guide blades is of significant importance.Using UG to construct a three-dimensional blade flow field model and Fluent to analyze the temperature field.The thermal growth oxide growth behavior and sintering conditions in various regions were observed to recalibrate the coating's physical properties and oxide layer thickness.ANSYS was utilized to obtain the distribution and magnitude of the coating stresses in each region,and the causes of thermal barrier coating failure in these regions were analyzed.The results show that the variability of oxidation and sintering behaviors due to the uneven temperature field is the root cause of the different damage levels of the thermal barrier coatings on the turbine guide blades.High stress concentration occurs in the coating of the blade basin region,with the maximum tensile stress reaching+299 MPa.This analysis provides a reference for component life assessment.
Turbine guide bladeThermal barrier coatingTemperature fieldTGO layerStress magnitude and distribution
万方数据
维普
