An Interface Nucleation Rate Limited Sintering Kinetic Model Applied to in situ Sintering Al2O3-SmAlO3 Composites
An Interface Nucleation Rate Limited Sintering Kinetic Model Applied to in situ Sintering Al2O3-SmAlO3 Composites
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DOI：
10.1016/j.jeurceramsoc.2023.02.058
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发表时间：
2023-02
影响因子：
5.7
通讯作者：
S. Dillon;Yong Ma;E. Lang;J. Ouyang;K. Hattar
中科院分区：
文献类型：
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作者：
S. Dillon;Yong Ma;E. Lang;J. Ouyang;K. Hattar
基于对双晶烧结的观察，最近提出了一种成核速率限制烧结模型。本工作验证了该模型在1130-1610℃范围内对Al_2O_3-SmAl_2O_3多晶团簇高温烧结的适用性。该模型能很好地拟合实验数据，并与双晶烧结过程中观察到的趋势相吻合。在透射电子显微镜下进行的常温加热实验中，观察到了主要的烧结应变变形模式与温度的关系。这些观察结果提供了关于温度如何通过局部去烧结影响孔尺寸分布来影响烧结早期阶段的见解。这对加热速度和烧结制度在影响晶粒尺寸与密度轨迹的微观组织演变中所起的作用提供了深入的了解。
A nucleation rate limited sintering model was recently developed based on observations of bicrystal sintering. This work validates the applicability of this model for sintering of polycrystalline clusters of Al2O3-SmAlO3at high temperature in the range of 1130–1610 ℃. The model fits the data well and agrees with trends observed during bicrystal sintering. A temperature dependence to the dominant sintering strain deformation modes is observed fromin situheating experiments performed in a transmission electron microscope (TEM). The observations provide insights into how temperature influences the early stages of sintering by affecting the pore size distribution through local de-sintering. This provides insights into the role heating rate and sintering schedule play in microstructural evolution that influences the grain size versus density trajectory.