Three dimensional imaging of electrical trees in micro and nano-filled epoxy resin
Three dimensional imaging of electrical trees in micro and nano-filled epoxy resin
复制标题
微米和纳米填充环氧树脂中电树的三维成像
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
P. Withers
中科院分区：
文献类型：
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作者：
R. Schurch;S. Rowland;R. Bradley;T. Hashimoto;G. Thompson;P. Withers
作者先前已经表明，未填充聚合物中的电树可以使用X射线计算机断层扫描（XCT）或连续块面扫描电子显微镜（SBFSEM）进行三维（3D）成像。在这里，我们提出的三维成像和分析的结果填充环氧树脂系统的第一次。在金刚石光源同步加速器上使用XCT扫描在未填充的、微米二氧化硅填充的和纳米二氧化硅填充的环氧树脂中产生的电树，然后还使用SBFSEM成像。树木的3D虚拟复制品已经生成，其结构特征。在微填充环氧树脂中成像比在纳米填充环氧树脂中更具挑战性。结果发现，树木填充到20重量%的样品与微二氧化硅可以使用XCT或SBFSEM成像。在所考虑的情况下，发现微填充环氧树脂中的树通道的平均直径（0.6 μm）比未填充或纳米填充环氧树脂中的树通道的平均直径（3 μm）小得多。
The authors have previously shown that electrical trees in unfilled polymers can be three-dimensionally (3D) imaged using X-ray computed tomography (XCT) or serial block-face scanning electron microscopy (SBFSEM). Here, we present the results of 3D imaging and analysis of electrical trees in filled epoxy systems for the first time. Electrical trees created in unfilled, micro silica-filled and nano silica-filled epoxy resin were scanned using XCT at the Diamond Light Source synchrotron and then also imaged using SBFSEM. 3D virtual replicas of the trees have been generated and their structures characterised. Imaging in micro-filled epoxy is more challenging than in nano-filled epoxy. It was found that trees in samples filled up to 20 wt% with micro silica can be imaged using either XCT or SBFSEM. In the case considered, the mean diameter of tree channels in micro-filled epoxy was found to be considerably smaller (0.6 μm) than in unfilled or nano-filled epoxies (3 μm).