2011 Fiscal Year Final Research Report
Development of oxygen activity sensor for scale surface on high temperature oxidation of alloys
| Project/Area Number |
21360368
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KAWAMURA Kenichi 東京工業大学, 大学院・理工学研究科, 准教授 (50270830)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 組織制御 / 高温酸化 |
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| Research Abstract |
In high-temperature oxidation of alloy, a growth of the oxide scale is depends on the gas supply from the atmosphere, surface reaction, and ionic diffusion in the oxide scale. Therefore, the oxygen potential of the scale surface is reduced by surface reaction and gas supply. Present study revealed that the distribution of oxygen potentials on high temperature oxidation of iron from the atmosphere to the scale surface by electromotive forces caused by a stabilized ZrO2 oxygen sensor with electrodes. In Ar-1% O2 atmosphere, the oxygen potential decreases with approaching the oxide film, the difference between the oxygen potential in the surface reaction was about-300kJmol^<-1>.
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