발간논문

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Vol.30, No.6, 621 ~ 630, 1992
Title
The Residual Stress Analysis of Plasma Sprayed ZrO2 - 8wt% Y2O3 Coating
이주동Joo Dong Lee, 나형용Hyung Yong Ra, 홍경태Kyung Tae Hong, 허성강Sung Kang Hur
Abstract
As the residual stress in the ZrO₂ coating affects adhesion strength, toughness and strength of the plasma spray coated layer, it is important to predict the variation in residual stress distribution. The residual stresses and distortions are important parameters to determine optimum spraying condition. A stress model is proposed to predict the trend for residual stress developed in the plasma spray coating. Residual stresses based on this model are computed by finite element method. Results of the analysis of the plasma sprayed ZrO₂ coating by finite element analysis were compared with XRD experimental observations in PSZ coated layer. Residual stresses (radial, circumferential and axial stresses) which remains compressive mainly decrease with coating depth and turns into tensile state near the substrate/coating interface. In the direction of axes, relatively large shear stress develops in the ZrO₂ coating.
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