Abstract Effect of thermally grown oxide (TGO) thickness on thermal shock resistance of thermal barrier coatings (TBCs) and also their behavior under a cyclic loading (including aging at maximum temperature) was evaluated experimentally. In order to form different thicknesses of TGO, coated samples experience isothermal loading at 1070 °C for various periods of times. Heat-treated samples were heated to 1000 °C and cooled down rapidly in water from the substrate side using a mechanical fixture. The life of samples was investigated as a function of TGO thickness. Furthermore, by performing an experiment the simultaneous effect of the TGO growth and thermal expansion mismatch– on the failure of thermal barrier coatings was evaluated. The results demonstrated that the presence of TGO with a thickness of 2–3 µm has a positive effect on the resistance against thermal shock.

中文翻译：

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TGO厚度对热冲击和热循环载荷下热障涂层寿命的影响

摘要 通过实验评估了热生长氧化物 (TGO) 厚度对热障涂层 (TBC) 抗热震性的影响及其在循环载荷下（包括在最高温度下老化）的行为。为了形成不同厚度的 TGO，涂层样品在 1070 °C 下经历不同时间的等温加载。热处理后的样品被加热到 1000 °C，然后使用机械夹具从基板侧在水中迅速冷却。研究样品的寿命作为 TGO 厚度的函数。此外，通过进行实验，评估了 TGO 生长和热膨胀失配对热障涂层失效的同时影响。