In situ investigation of ceramic sintering by synchrotron radiation X-ray computed tomography
In situ investigation of ceramic sintering by synchrotron radiation X-ray computed tomography
复制标题
同步辐射X射线计算机断层扫描对陶瓷烧结的原位研究
DOI：
10.1016/j.optlaseng.2009.12.012
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发表时间：
2010-11
影响因子：
4.6
通讯作者：
Xu, Feng
中科院分区：
文献类型：
--
作者：
Zhao, Jian-Hua;Hu, Xiao-Fang;Miao, Hong;Xu, Feng
采用同步辐射x射线计算机断层扫描技术研究了陶瓷材料在烧结过程中的微观结构演变。研究了松散陶瓷粉末和压实块状材料两种试样。利用滤波反投影算法对投影图像进行分析，得到重建的二维和三维结构。在陶瓷粉末和压实试样的重建图像中，可以清晰地观察到晶粒接触、晶粒生长、烧结颈生长和孔隙球化三个烧结阶段的烧结现象。对于第二烧结阶段的粉末样品，在重构图像的双对数坐标下，平均晶粒半径与烧结时间呈线性关系。对曲线进行线性拟合，得到0.34的晶粒生长指数。对于压实的块状材料，孔隙率的变化是对数烧结时间的函数，在三个烧结阶段表现出不同的致密化特征，在烧结中期孔隙率与对数时间呈线性关系。实验结果与传统烧结理论基本一致。
In this study, microstructure evolution of ceramic materials during sintering is investigated by synchrotron radiation X-ray computed tomography technique. Two kinds of specimens, including loose ceramic powder and compacted bulk material, are studied. The reconstructed 2D and 3D structures are obtained by analyzing the projection images with filtered backprojection algorithm. Sintering phenomena during three sintering stages, including grain contact, grain growth, sintering neck growth, and pore spheroidization, are clearly observed in both the reconstructed images of ceramic powder and the compacted bulk samples. For powder samples in the second sintering stage, the mean grain radius shows linear relationship with sintering time in double logarithmic coordinates obtained from the reconstructed images. The grain growth exponent of 0.34 is extracted from linear fitting of the curve. For compacted bulk materials, the change in porosity is obtained as a function of logarithmic sintering time, showing different densification characteristics in three sintering stages, and linear relationship between porosity and logarithmic time in the middle stage of sintering. The experimental results are in accordance with traditional sintering theory.
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影响因子：
5.2
作者：
Jianlin Shi;Chen-Gui Lu;C. L. Kuo;Zhiquan Lin;T. Yen
通讯作者：
Jianlin Shi;Chen-Gui Lu;C. L. Kuo;Zhiquan Lin;T. Yen
影响因子：
4.6
作者：
L. Hong;Lijun Li;C. Ju
通讯作者：
L. Hong;Lijun Li;C. Ju
影响因子：
3.2
作者：
COBLE, RL
通讯作者：
COBLE, RL
影响因子：
3.2
作者：
COBLE, RL
通讯作者：
COBLE, RL
影响因子：
9.4
作者：
L. Kong;Zhaoliang Li;G. Lin;Y. Gan
通讯作者：
L. Kong;Zhaoliang Li;G. Lin;Y. Gan