Abstract
The thermoelastic behaviors of such as temperature distribution, displacements, and stresses in thermal barrier coatings (TBC) are seriously influenced by top coat thickness and edge conditions. The top coat of TBC specimens prepared with TriplexPro?-200 system was controlled by changing the processing parameter and feedstock, showing the various thicknesses and microstructures. A couple of governing partial differential equations were derived based on the thermoelastic theory. Since the governing equations were too involved to solve analytically, a finite volume method was developed to obtain approximations. The thermoelastic behaviors of TBC specimens with the various thicknesses and microstructures were estimated through mathematical approaches with different edge conditions. The results demonstrated that the microstructure and thickness of the top coat, and the edge condition in theoretical analysis were crucial factors to be considered in controlling the thermoelastic characteristics of plasma-sprayed TBCs.
Highlights
IntroductionCeramic thermal barrier coating (TBC) technique is a widely used method to improve the durability of metal
Ceramic thermal barrier coating (TBC) technique is a widely used method to improve the durability of metalHow to cite this paper: Go, J. and Lee, J.-H. (2014) Effects of Layer Thickness and Edge Conditions to Thermoelastic Characteristics on Thermal Barrier Coatings
The thermoelastic characteristics have been investigated for various TBC models
Summary
Ceramic thermal barrier coating (TBC) technique is a widely used method to improve the durability of metal. (2014) Effects of Layer Thickness and Edge Conditions to Thermoelastic Characteristics on Thermal Barrier Coatings. Zotov et al [6] and Schulz [7] investigated the effects of thermal annealing on the microstructure of TBCs deposited by EB-PVD. The microstructure features of TBCs fabricated through ASP process are clarified by Jung et al [8] and Lee et al [9]. The microstructural feature yields crucial effects on the thermal and mechanical properties in TBC systems. The effects of top coat thickness to the thermoelastic characteristics of TBC circular specimens are analyzed considering different boundary conditions. The results and the analysis performed may contribute further understanding to the thermoelastic behaviors of TBCs
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