The residual stresses in a dense yttria‐stabilized zirconia (YSZ) layer bonded to a porous NiO‐YSZ substrate were measured by X‐ray diffraction in air between 25°C and 900°C. It was found that the residual stresses on the outer surface of the YSZ layer were compressive, that their magnitude increased with decreasing temperature, and that the temperature dependence was nonlinear particularly at temperatures below 600°C. An elastic model that incorporates micromechanics and laminate theory was formulated to successfully predicts the nonlinearity of the temperature dependence of the residual stresses by accounting for the effect of the order‐disorder transition experienced by YSZ around 600°C and the magnetic transition of NiO at the Néel temperature around 265°C, on the properties of these materials. The implications of the results for the reliability of solid oxide fuel cells are discussed.

中文翻译：

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固体氧化物燃料电池中残余应力的非线性温度依赖性

在25°C至900°C的空气中通过X射线衍射测量了粘结在多孔NiO-YSZ衬底上的致密氧化钇稳定氧化锆（YSZ）层中的残余应力。发现YSZ层的外表面上的残余应力是压缩应力，其强度随着温度的降低而增加，并且温度依赖性尤其是在低于600℃的温度下是非线性的。建立了一个包含微力学和叠层理论的弹性模型，通过考虑YSZ在600°C左右经历的有序无序转变和NiO的磁化转变的影响，成功预测了残余应力的温度依赖性的非线性。 Néel温度约为265°C，这取决于这些材料的性能。