DETERMINATION OF CREEP PROPERTIES OF THERMAL BARRIER COATING(TBC) SYSTEMS FROM THE INDENTATION CREEP TESTING WITH ROUND FLAT INDENTERS

金属学报(英文版), 2004, 17(4): 503-508.

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1.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnic University, Xi'an,710072, China

2.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnic University, Xi'an,710072, China

3.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnic University, Xi'an,710072, China

4.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnic University, Xi'an,710072, China

基金项目: 国家航天基金国家自然科学基金

DETERMINATION OF CREEP PROPERTIES OF THERMAL BARRIER COATING(TBC) SYSTEMS FROM THE INDENTATION CREEP TESTING WITH ROUND FLAT INDENTERS

Keywords： thermal barrier coating (TBC) system

Indentation creep behavior with cylindrical flat indenters on the thermal barrier coating (TBC) was studied by finite element method (FEM). On the constant applied indentation creep stress, there is a steady creep rate for each case studied for different creep properties of the TBC system. The steady creep depth rate depends on the applied indentation creep stress and size of the indenters as well as the creep properties of the bond coat of the TBC and the substrate. The possibilities to determine the creep properties of a thermal barrier system from indention creep testing were discussed. As an example, with two different size indenters, the creep properties of bond coat of the TBC system can be derived by an inverse FEM method. This study not only provides a numerical method to obtain the creep properties of the TBC system, but also extends the application of indentation creep method with cylindrical flat indenters.

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DETERMINATION OF CREEP PROPERTIES OF THERMAL BARRIER COATING(TBC) SYSTEMS FROM THE INDENTATION CREEP TESTING WITH ROUND FLAT INDENTERS

参考文献