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Formation Mechanism of Microchannels and Lining Layers in Sintered Iron Powder Compacts with Copper Sacrificial Cores
| Title: | Formation Mechanism of Microchannels and Lining Layers in Sintered Iron Powder Compacts with Copper Sacrificial Cores |
| Authors: | Ohmi, Tatsuya Browse this author →KAKEN DB | | Kodama, Takuhiro Browse this author | | Iguchi, Manabu Browse this author |
| Keywords: | microchannel | | microreactor | | powder metallurgy | | infiltration | | diffusion | | functional microchannel lining |
| Issue Date: | 1-Dec-2009 |
| Publisher: | The Japan Institute of Metals |
| Journal Title: | MATERIALS TRANSACTIONS |
| Volume: | 50 |
| Issue: | 12 |
| Start Page: | 2891 |
| End Page: | 2896 |
| Publisher DOI: | 10.2320/matertrans.M2009252 |
| Abstract: | The formation mechanism of microchannels with Fe-Cu alloy lining layers in iron bodies produced by a powder-metallurgical microchanneling process has been investigated. Copper wire was used as a sacrificial core that gives the shape of the microchannel and supplies the alloying element for the lining layer. An iron powder compact containing the sacrificial core was heated and sintered at temperatures between the melting points of copper and iron. Quenching experiments showed that the microchannel was produced just after melting of copper. In a quenched specimen with a newly-formed microchannel, fine copper-rich regions were observed between the iron powder particles in the lining layer. These results established that infiltration of molten copper into the iron powder is the dominant mechanism for the Fe-Cu microchanneling process. It was also found that the liquid copper infiltrated via preferential flow pathways between the iron powder particles. |
| Relation: | https://www.jstage.jst.go.jp/article/matertrans/50/12/50_M2009252/_article |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74706 |
| 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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