Shape Distortion and Delamination During Constrained Sintering of Ceramic Stripes: Discrete Element Simulations and Experiments
Shape Distortion and Delamination During Constrained Sintering of Ceramic Stripes: Discrete Element Simulations and Experiments
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DOI：
10.1111/j.1551-2916.2011.04939.x
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发表时间：
2012-02
影响因子：
3.9
通讯作者：
T. Rasp;C. Jamin;A. Wonisch;T. Kraft;O. Guillon
中科院分区：
文献类型：
--
作者：
T. Rasp;C. Jamin;A. Wonisch;T. Kraft;O. Guillon
基于粒子的模拟，使用离散元法适用于烧结薄陶瓷条，由刚性基板的约束。在基底附近的横向颗粒运动的抑制导致垂直于基底的优选收缩方向，这导致形状变形以及界面边缘处的条带的分层。在模拟中改变多个处理参数以分析它们对所述效果的影响。颗粒重排的量和横截面的高度与宽度的纵横比被确定为确定形状变形和边缘分层的水平的因素。模拟结果进行了比较与测量的软微成型在毛细管中产生的条纹。关于轴向和横向收缩或分层角等参数，观察到良好的一致性。
Particle-based simulations using the discrete element method are applied for the sintering of thin ceramic stripes that are constrained by a rigid substrate. The inhibition of lateral particle movement in vicinity of the substrate leads to a preferred shrinkage direction perpendicular to the substrate, which causes shape distortion as well as delamination of the stripe at the interface edges. Multiple processing parameters are varied in simulations to analyze their influence on the mentioned effects. The amount of particle rearrangement and the height to width aspect ratio of the cross-section are identified to be factors that determine the level of shape distortion and edge delamination. The simulation results are compared with measurements of stripes produced by soft micromolding in capillaries. Good accordance is observed regarding parameters like axial and lateral shrinkage or delamination angle.