| Budget Amount *help |
¥28,860,000 (Direct Cost: ¥22,200,000、Indirect Cost: ¥6,660,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2012: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
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| Outline of Final Research Achievements |
In order to prove the vacancy formation by phase transformation, positron annihilation techniques were applied to detect the vacancy formation for aging of aluminum alloys and for internal oxidation process of silver alloys. It was shown that vacancies are introduced during the the precipitation of β”phase in aged aluminum alloys, and in case of oxidized silver alloys vacancy and vacancy-clusters are formed during internal oxidation. These results support the new vacancy formation mechanism by phase transformation.
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