Geometrical instability leading to cambering is recorded during co-sintering of zirconia dense/porous bi-layered planar structures. Sintering strain in the bi-layers rises mainly from mismatch between the different porosity volume fractions at the layers and their interface. In this paper, we analyze the model case of dense taped of 8 mol% Y₂O₃-stabilized ZrO₂ laminated on ca. 400 μ thick 3 mol% Y₂O₃ doped zirconia porous tapes, with homogenous spherical porosity of 13 vol%, 46 vol%, and 54 vol%. Sintering stress during densification is evaluated from the shrinkage rates and viscoelastic behavior during sintering by thermo-mechanical analysis, using cyclic loading dilatometry. The camber development of the bi-layers is measured by in-situ optical dilatometry. In accordance with the model prediction, cambering can be controlled tuning the porosity while achieving a synergetic effect between densification and formation of open porosity at the bilayers.

在氧化锆致密/多孔双层平面结构的共烧结期间记录了导致翘曲的几何不稳定性。双层中的烧结应变主要是由于各层的不同孔隙率和界面之间的失配引起的。在本文中，我们分析了8 mol％Y ₂ O ₃稳定的ZrO ₂层压在ca上的致密胶带的模型情况。400μ厚3 mol％Y ₂ O ₃掺杂的氧化锆多孔带，具有13％（体积），46％（体积）和54％（体积）的均匀球形孔隙率。利用循环载荷膨胀法，通过热机械分析，由烧结过程中的收缩率和粘弹性行为来评估致密化过程中的烧结应力。通过原位光学膨胀​​法测量双层的外倾发展。根据模型预测，可以控制弯度以调节孔隙率，同时在致密化和双层中形成开放孔隙之间达成协同效应。