Development Of Thermal Barrier Coating Condition Simulation And Real Time Monitoring Device

Aero-engine is the card that shows the national industrial technology level.In order to protect the hot end components of aircraft engine and improve the thermal efficiency,thermal barrier coatings(TBCs)is commonly used in engine,that is one of the key engine technologies.However,the geometry of engine blades and thermal barrier coatings is extremely complex,and its working condition is complex thermo-chemo-mechanical coupling environment.It is not realistic to explore its destruction mechanism simply by using traditional experimental methods,and the human and material resources used in the test drive on aero-engines are extremely large.Therefore,this thesis presents a design scheme of a thermal barrier coating condition simulation and real time monitoring device,and the experimental verification is carried out.The main contents are as follows:Firstly,in order to simulate the working conditions of high temperature flame impact,hard particle erosion and corrosion material erosion in aero-engine,the condition simulation load module of TBCs is designed in this thesis.This module mainly includes two parts,namely the supersonic loading spray gun used for the formation of high temperature supersonic flame,erosion or corrosion particle airflow,and the powder feeder for powder loading in the spray gun.This module is one of the core modules of the device,which realizes the simulation of "high temperature,erosion and corrosion" working conditions of TBCs.Secondly,automatic multi-station cycle test can be carried out in this thesis,and the automatic cycle test can be carried out for different samples in multiple stations.The clamping system of plate sample or the real blade is designed,and the spray gun control and display system of automatic reciprocating movement is developed.Combined the gun automatic cycle movement with clamping system,the automatic multi-station cycle test is realized.Thirdly,a set of test control and display system is designed.This system is mainly used to control and adjust the test process and test parameters,and display the test data in real time.At the same time,the system integrates some nondestructive testing systems,which can be able to real time monitor the surface strain field,temperature field,crack initiation and extension in TBCs.In addition the synchronous concentrated display of all kinds of NDT equipment data is realized.Finally,according to the device development train of thought and solution processing,assembling the test apparatus and carrying out the test verification,the results show that the design effect of the condition simulation and real-time monitoring device of thermal barrier coating is expected to meet the development goal.In a word,the TBCs condition simulation and real-time monitoring device is developed in this thesis,which can simulate the TBCs conditions such as high temperature-erosion-corrosion environment and real-time monitor the failure process.The device can provide effective experimental evidence for studying the failure mechanism of the TBCs and its safety application.