Studying degradation and failure of Thermal Barrier Coatings (TBCs) with Characterisation of TBCs
讲座名称：
Studying degradation and failure of Thermal Barrier Coatings (TBCs) with Characterisation of TBCs
讲座时间：
2019-01-08
讲座人：
肖平
形式：
校区：
兴庆校区
实践学分：
讲座内容：
应机械结构强度与振动国家重点实验室邀请，英国曼彻斯特大学肖平教授来访我院并作学术报告。
讲座题目：Studying degradation and failure of Thermal Barrier Coatings (TBCs) with Characterisation of TBCs
讲座时间：2019年1月8号（星期二）16:00
讲座地点：航天航空学院教一楼第三会议室
讲座人：Ping Xiao（肖平） 教授
讲座内容：
Thermal barrier coatings have been studied extensively for decades and many studies have been carried out with purpose of extending the lifetime of TBCs in service, however, the degradation and failure mechanisms of TBCs during and after being exposed to high temperature environments are still under debate. In this talk, I would like to present the TBC characterisation study which has been carried out in University of Manchester for more than a decade, and the study has been carried out with close collaboration between the researchers in University of Manchester, academic and industrial collaborators worldwide. The characterisation study has been focused on 1) non-destructive evaluation of TBCs with use of impedance spectroscopy and X-ray tomography, 2) measurements of the residual stresses in TBCs with use of Raman/fluorescence spectroscopy, X-ray diffraction and synchrotron X-ray beam, 3) measurements of the coating/substrate adhesion with use of the strain to failure method and four point bending method, 4) Measurement of Sulphur distribution in TBCs to understand its effect on failure of TBCs. It has been concluded that to understand the degradation and failure mechanisms of TBCs, multiple characterisation techniques should be used while both studies on manufacture and characterisation of TBCs are essential.
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