373 遮熱コーティング界面の酸化層成長解析 : 酸化層成長によるはく離寿命予測(界面と接着・接合の力学3,OS10 界面と接着・接合の力学)

概要

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Thermal barrier coating (TBC) fractures by delamination after thermal cycles. The delamination is due to the growth of thermally grown oxide (TGO) layer at the interface between top and bond coatings. This paper proposes a method to predict thermal fatigue life of TBC. The method uses a damage factor to predict it. The factor is composed of two parameters. One is maximum strain in TBC near the interface after the growth of TBO layer. The strain is calculated from the simulation of the growth of TGO layer. Another is limit strain that is decided from the results in heating test of specimen with TBC. The life prediction method is very simple so that it is useful in the design of high parts with TBC.
2006-11-02