| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2012: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
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| Outline of Final Research Achievements |
Positron annihilation technique affords us a lot of information on open-volume type defects in bulk, but the locally induced defects in materials are far from equilibrium and have never been clarified yet. We have been developed positron probe microanalyzer (PPMA) to measure the local area with several tens micron meter. PPMA has been applied to detection of hydrogen-related defects in metals since hydrogen reduces a formation energy of defects and affects their properties. As a result, it has been found that vacancy clusters extend in wider area, compared with usual in pure ion subjected to hydrogen embrittlement and are involved in the electrodeposited Cu film. A formation of vacancy clusters is influenced with the mechanical properties.
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