| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2012: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
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| Outline of Final Research Achievements |
Development of biodegradable metallic implants that eliminate the need of a second operation for removal has been strongly desired. As a new candidate, we focused the use of intermetallic compounds. In intermetallic compounds, different atomic species occupy designated lattice sites, and are typically held together by strong bonds. The variations in bond properties between the varying atomic species were expected to control the degradation behavior of the material. In this study we focused on the Ca-Mg-Si and Ca-Mg-Zn ternary systems. As a result, the control of the degradation behavior by forming compounds was actually accomplished as expected. Especially, in Ca-Mg-Zn compounds, the formation of Zn-containing oxide as a protective layer against corrosion on the specimen surfaces was found to strongly affect their corrosion properties.
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