Testing device for simulation and real-time detection of high-temperature deposition corrosion of thermal barrier coatings

Abstract

The invention discloses a testing device for simulation and real-time detection of high-temperature deposition corrosion of thermal barrier coatings, belonging to the field of simulation devices in a special service environment. The testing device comprises a test board which is equipped with a sample fixture and a fixture fixing device, a cooling system, a high-temperature corrosion service environment simulation module, an exhaust system, a complex impedance spectroscopy measuring system, an acoustic emission testing system and a test control and display platform, wherein the complex impedance spectroscopy measuring system and the acoustic emission testing system are integrated together. The device can be used for adjusting the parameters such as variety, concentration, corrosive temperature of corrosive medium. The change of coating impedance and damaged acoustic emission signals when a sample is corroded can be periodically detected by the complex impedance spectroscopy measuring system and the acoustic emission testing system, the high-temperature corrosion of various impurity particles, such as Ca, Mg, Al, Si and Na of thermal barrier coatings of aero-engine turbine blades in actual service temperature environment is actually simulated; in addition, the corrosion failure process is periodically detected; and an important test platform is provided for correctly understanding the high-temperature corrosion mechanism of thermal barrier coatings and optimizing the material design thereof.

Description

technical field [0001] The invention relates to a test device for simulating and real-time testing the corrosion of thermal barrier coatings by high-temperature deposits, in particular to a process for simulating the melting and deposition of solid particles in an aero-engine on the surface of a thermal barrier coating, and then corroding the thermal barrier coating, and The invention relates to a test device for realizing real-time testing of multiple corrosion parameters, belonging to the field of special service environment simulation devices. Background technique [0002] Thermal barrier coatings (thermal barrier coatings, referred to as TBCs) are currently one of the most advanced high-temperature protective coatings at home and abroad. Because of the "thermal barrier" effect of the low thermal conductivity of the ceramic coating, the superalloy turbine blades can withstand the same temperature At this time, the gas temperature can be increased by 200-300 °C, thereby im...

AI Technical Summary

Problems solved by technology

In these methods, on the one hand, the corrosion environment of TBCs can only be simulated by generating corrosive gas; on the other hand, there is no real-time detection or evaluation of the process of TBCs corrosion failure.

Images