Figure 7

Cross-sectional TEM images. At the near-surface of (a) 350°C treatment sample, (b) 600°C treatment sample, (c) magnified image of 350°C treatment sample, and (d) magnified image of 600°C treatment sample.
Cross-sectional TEM images. At the near-surface of (a) 350°C treatment sample, (b) 600°C treatment sample, (c) magnified image of 350°C treatment sample, and (d) magnified image of 600°C treatment sample.