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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: A procedure for stable electrical measurements on a rock sample against high contact resistance as a prerequisite for electrical tomography

Fig. 5

Microstructures of the contact surface observed by micro-focus X-ray computed tomography (CT). a Sample photograph showing the 100 mm2 electrode. CT images of the b x–z and c x–y planes; the pixel size is approximately 4 μm, and the scale bar in each image is 500 μm. Black in the CT images represents areas of X-ray transmission; the white areas are opaque to X-rays. Here, black represents mainly air, dark grey is mainly granite, and light grey is the conductive epoxy adhesive and wires

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