A thermal barrier coating service life measuring and calculating method and device

Abstract

The invention discloses a thermal barrier coating service life measuring and calculating method. The method comprises the steps of obtaining historical use data of a user, component structure information of a thermal barrier coating and planned use working conditions of components; obtaining a life prediction model of the thermal barrier coating according to the obtained user historical use data, the component structure information of the thermal barrier coating and the planned use condition of the component; measuring a microstructure damage factor of the thermal barrier coating; correcting the fitting coefficient of the life prediction model through the measured microstructure damage factor of the thermal barrier coating, obtaining the corrected life prediction model, and obtaining the life of the thermal barrier coating. A thermal barrier coating nondestructive testing device is adopted to measure crack distribution and TGO layer key parameters of a service part, the measured data can be used for verifying and correcting a thermal barrier coating service life prediction algorithm and CFD boundary conditions, the accuracy of thermal barrier coating service life prediction is improved, and dynamic prediction of the thermal barrier coating service life in the part service period is achieved.

Description

technical field [0001] The invention belongs to the technical field of detection of thermal barrier coatings, and in particular relates to a method and equipment for measuring and calculating the life of thermal barrier coatings. Background technique [0002] In the service environment, the hot end components of industrial gas turbines are not only subjected to high temperature and high pressure gas, but also to high heat flow input, high temperature gradient, stress gradient, centrifugal force and other effects. Thermal barrier coating (thermal barrier coating, TBC) can effectively prolong the service life of the hot end components. Therefore, predicting the failure time of TBC can effectively realize the prediction of the service life of the hot end components of the gas turbine. [0003] The common composition of the TBC system is the outermost ceramic layer (TC), the bonding layer (BC), and the thermally grown oxide layer (thermally grown oxide, TGO) that grows over tim...

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Problems solved by technology

This method is based on the results of material performance tests in a simulated environment, and cannot achieve self-calibration and self-correction of the algorithm

The results obtained are not accurate enough

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