| Project/Area Number |
25630328
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Osaka University |
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Principal Investigator |
FUJIMOTO Shinji 大阪大学, 工学(系)研究科(研究院), 教授 (70199371)
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| Co-Investigator(Kenkyū-buntansha) |
TSUCHIYA Hiroaki 大阪大学, 大学院工学研究科, 准教授 (50432513)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 腐食防食 / 表面改質 / 半導体 / 電子構造 / ステンレス鋼 / ニッケル基合金 / インピーダンス / 光電気化学 |
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| Outline of Final Research Achievements |
The present work examined semiconductive properties of passive films on metallic substrates and modification of passive films based on photo-induced excitation. We revealed the band structures of passive films formed on stainless steel and nickel-based alloys in aqueous solutions. As a result, it was found that the photo-induced modification behavior of passive films can be attributed to the band structure of passive films. In humid atmospheric environments the thickness of passive film on a stainless steel increased and Cr fraction in the passive film decreased, but it was revealed that photo-irradiation can suppress the thickness increase and the decrease of Cr fraction in the passive film.
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