Direct comparison between X-ray nanotomography and scanning electron microscopy for the microstructure characterization of a solid oxide fuel cell anode
Direct comparison between X-ray nanotomography and scanning electron microscopy for the microstructure characterization of a solid oxide fuel cell anode
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X 射线纳米断层扫描和扫描电子显微镜对固体氧化物燃料电池阳极微观结构表征的直接比较
DOI：
10.1016/j.matchar.2013.02.001
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发表时间：
2013
影响因子：
4.7
通讯作者：
P. Bleuet
中科院分区：
文献类型：
--
作者：
R. Quey;H. Suhonen;J. Laurencin;P. Cloetens;P. Bleuet
X 射线计算机纳米断层扫描 (nano-CT) 和扫描电子显微镜 (SEM) 已用于表征固体氧化物燃料电池 (SOFC) 阳极的微观结构。在微观结构的同一区域上对两种方法的结果进行直接比较，以评估纳米 CT 微观结构的空间分辨率，以 SEM 作为参考。提出了一种配准程序来找出 SEM 图像在纳米 CT 体积内的位置。它涉及第二次 SEM 观察，该观察沿正交方向进行，并给出估计的参考 SEM 图像位置，然后通过自动优化程序进行细化。这使得可以对两种方法提供的细胞孔隙率形态进行公正的比较。在本实验中，纳米 CT 低估了小于 1μm 的孔隙数量，高估了大于 1.5μm 的孔隙尺寸。
X-ray computed nanotomography (nano-CT) and scanning electron microscopy (SEM) have been applied to characterize the microstructure of a Solid Oxide Fuel Cell (SOFC) anode. A direct comparison between the results of both methods is conducted on the same region of the microstructure to assess the spatial resolution of the nano-CT microstructure, SEM being taken as a reference. A registration procedure is proposed to find out the position of the SEM image within the nano-CT volume. It involves a second SEM observation, which is taken along an orthogonal direction and gives an estimate reference SEM image position, which is then refined by an automated optimization procedure. This enables an unbiased comparison between the cell porosity morphologies provided by both methods. In the present experiment, nano-CT is shown to underestimate the number of pores smaller than 1μm and overestimate the size of the pores larger than 1.5μm.