Effects of Layer Thickness and Edge Conditions to Thermoelastic Characteristics on Thermal

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 var-ious thicknesses and microstructures were estimated through mathematical approaches with dif-ferent 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 con-trolling the thermoelastic characteristics of plasma-sprayed TBCs

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Last time updated on 12/04/2017

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