| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Outline of Final Research Achievements |
Low-angle grain boundaries of α-Al2O3 with different dopant atoms were investigated by transmission electron microscopy. The grain boundaries were found to consist of a periodic dislocation array. It was revealed that the dopant atoms segregated into the tensile strain region of each dislocation core. In addition, the dopant distributions were related to the valence state of the dopant atoms. Therefore, it was suggested that the dopant segregation behavior in ionic crystals is dependent on not only the elastic interaction but also electrostatic interaction.
To develop a new in-situ TEM mechanical testing system, we designed a MEMS device with an actuator and performed device test in situ. Furthermore, sample preparation methods for experiments using this device were considered. The device performance was up to our expectations. However, it was found that improvements need to be made in the sample preparation.
|
