Figure 13

Electric resistance versus time during tests (a) Schematic diagram of sample segmentation (b) electric resistance of up regions (part 1 and 2) and (c) electric resistance of lower regions (part 1 and 2).

Electric resistance versus time during tests (a) Schematic diagram of sample segmentation (b) electric resistance of up regions (part 1 and 2) and (c) electric resistance of lower regions (part 1 and 2).