2009 Fiscal Year Final Research Report
Formation mechanism of aligned microporous structures in the intermetallic thick films produced by microscopic reactive infiltration
| Project/Area Number |
19560740
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Hokkaido University |
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Principal Investigator |
OHMI Tatsuya Hokkaido University, 大学院・工学研究科, 准教授 (90169061)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 融体・凝固 |
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| Research Abstract |
An intermetallic thick film with a peculiar aligned microporous structure often forms on the inner wall of the microchannel produced by a powder-metallurgical microchanneling process using nickel and aluminum. In this study, it was found that such a porous structure formed when the initial porosity of the powder compact was within a specific rage. It was also revealed that this structure was produced by two different mechanisms : pseudo-isothermal solidification of intermetallic compounds into the aluminum pool and solid state reactive diffusion of aluminum into the nickel powder region.
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