Table 1 Statistical data of thickness expansion along the lateral direction.
State of specimens | No. of specimens | Minimum thickness (µm) | Maximum thickness (µm) | Average thickness (µm) | Standard deviation |
|---|---|---|---|---|---|
Healthy | 80 | — | — | — | — |
Initial state | 80 | 154.42 | 168.84 | 160.88 | ±3.35 |
After 5 days | 80 | 925.16 | 987.54 | 968.86 | ±13.92 |
After 7 days | 80 | 1243.21 | 1288.15 | 1263.04 | ±9.37 |
After 10 days | 80 | 1904.41 | 2043.58 | 1989.32 | ±12.97 |
After 15 days | 80 | 2500.24 | 2572.52 | 2505.22 | ±14.81 |
After 20 days | 80 | 2965.11 | 3011.78 | 2977.92 | ±8.99 |
After 25 days | 80 | 3234.81 | 3334.69 | 3234.88 | ±13.85 |
