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Formation Mechanism of Microchannels and Lining Layers in Sintered Iron Powder Compacts with Copper Sacrificial Cores

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/74706

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)

Submitter: 大参 達也

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