Numerical study on the thermo-stress of ZrO2 thermal and barrier coatings by high-intensity pulsed ion beam irradiation
Wu Di(吴迪)a)b),Liu Chen(刘臣) b), Zhu Xiao Peng(朱小鹏)b), and Lei Ming Kai(雷明凯)b)
a College of Physical Science and Technology, Dalian University, Dalian 116622, China; b Surface Engineering Laboratory, Dalian University of Technology, Dalian 116024, China
Abstract This paper studies numerically the thermo-mechanical effects of ZrO2 thermal barrier coatings (TBCs) irradiated by a high-intensity pulsed ion beam in consideration of the surface structure. Taking the deposited energy of ion beams in TBCs as the source term in the thermal conduction equation, the distribution of temperature in TBCs was simulated. Then, based on the distribution, the evolution of thermal stress was calculated by the finite element method. The results show that tensile radial stress formed at the valley of TBC surfaces after irradiation by HIPIB. Therefore, if cracks happen, they must be at valleys instead of peaks. As for the stress waves, no matter whether through peak or valley position, tensile and compressive stresses are present alternately inside TBCs along the depth direction, and the strength of stress decreases with time.
Received: 29 September 2008
Revised: 07 April 2009
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 50575037) and the
Doctoral Foundation of Dalian University of China (Grant No
SBQ200810).
Cite this article:
Wu Di(吴迪),Liu Chen(刘臣), Zhu Xiao Peng(朱小鹏), and Lei Ming Kai(雷明凯) Numerical study on the thermo-stress of ZrO2 thermal and barrier coatings by high-intensity pulsed ion beam irradiation 2009 Chin. Phys. B 18 4976
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