Localised investigation of coarse grain gold with the scanning droplet cell and by the Laue method
Localised investigation of coarse grain gold with the scanning droplet cell and by the Laue method
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DOI：
10.1016/s0013-4686(99)00082-1
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发表时间：
1999-01-01
影响因子：
6.6
通讯作者：
Seo, M
中科院分区：
文献类型：
--
作者：
Hassel, AW;Seo, M
采用扫描液滴池（SDC）对粗粒金试样进行了研究。获得了单个晶粒上的伏安图，并显示出（111）单晶面的特征形状。还记录了容量的潜在依赖性。通过劳厄X射线背散射确定每个晶粒的晶体取向。所有晶粒都具有（111）取向，但方位角不同。这个角度是定量确定不同的晶粒。SEM显微照片显示晶界宽度约为12 μ m。用扫描阻抗法研究了晶粒和晶界的台阶。使用三种不同的液滴直径（50、100和250 μ m）。所有细胞均能检测到晶界。从该实验中确定了晶界内的局部容量。据发现，这是60%以上的粮食本身，可能是由于扩大面积内的沟。试样的结构进行了讨论，并提出了一个模型描述的结果。(C)1999 Elsevier Science Ltd.保留所有权利。
A coarse grain gold specimen was investigated using the scanning droplet cell (SDC). Voltamograms on single grains were obtained and show the shape which is characteristic for a (111) single crystal plane. The potential dependence of the capacity was recorded as well. The crystallographic orientation of each grain was determined by Laue X-ray back scattering. All grains have a (111) orientation but different azimuth angles. This angle was determined quantitatively for different grains. SEM micrographs show that the breadth of the grain boundaries is some 12 mu m. The terraces of the grain and the grain boundaries were investigated by scanning impedance measurements using the SDC. Three different droplet diameters (50, 100 and 250 mu m) were used. The grain boundary could be detected with all cells. The local capacity within the grain boundary was determined from this experiment. It is found to be 60% higher than that of the grains themselves, probably due to the enlarged area within the ditch. The structure of the specimen is discussed and a model describing the results is presented. (C) 1999 Elsevier Science Ltd. All rights reserved.