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Powder-Metallurgical Process for Producing Metallic Microchannel Devices
| Title: | Powder-Metallurgical Process for Producing Metallic Microchannel Devices |
| Authors: | Ohmi, Tatsuya Browse this author →KAKEN DB | | Takatoo, Masashi Browse this author | | Iguchi, Manabu Browse this author | | Matsuura, Kiyotaka Browse this author →KAKEN DB | | Kudoh, Masayuki Browse this author |
| Keywords: | microchannel | | powder metallurgy | | Infiltration | | intermetallic compound | | functional-material lining |
| Issue Date: | Sep-2006 |
| Publisher: | The Japan Institute of Metals |
| Journal Title: | MATERIALS TRANSACTIONS |
| Volume: | 47 |
| Issue: | 9 |
| Start Page: | 2137 |
| End Page: | 2142 |
| Publisher DOI: | 10.2320/matertrans.47.2137 |
| Abstract: | We investigated a simple and economical method for producing free-form microchannels in metal bodies. The concept for our process is based on a microscopic infiltration phenomenon that often occurs during liquid phase sintering of a mixture of metal powders with different melting points. A shaped compound of the metal powder with lower melting point and an organic binder are used as the sacrificial core that gives the shape of the microchannel. A body-metal powder compact that includes the sacrificial core is sintered at a temperature between the melting points of the sacrificial-core metal and body metal. The organic binder is removed during heating of the powder compact, and infiltration of molten sacrificial-core metal into the body-metal powder produces a microchannel and a lining layer. We examined following combinations of metal powders: titanium-aluminum, nickel-aluminum, copper-tin, and iron-copper. Metallographic observations confirmed that microchannels were produced in the metallic bodies in all these systems. Furthermore, in the case of the titanium body metal with an Al-Cu alloy sacrificial-core metal, the inner wall of the microchannel was smoother than the case of titanium with aluminum. The copper content of the sacrificial-core metal influenced the composition and structure of the microchannel lining. |
| Relation: | https://www.jstage.jst.go.jp/article/matertrans/47/9/47_9_2137/_article |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74702 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 大参 達也
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