|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Formation of Porous Intermetallic Thick Film by Ni-Al Microscopic Reactive Infiltration
| Title: | Formation of Porous Intermetallic Thick Film by Ni-Al Microscopic Reactive Infiltration |
| Authors: | Ohmi, Tatsuya Browse this author →KAKEN DB | | Hayashi, Naoya Browse this author | | Iguchi, Manabu Browse this author |
| Keywords: | microporous structure | | thick film | | intermetallic compound | | nickel aluminide | | microchannel | | reactive infiltration | | powder metallurgy | | microreactor | | catalyst support |
| Issue Date: | Nov-2008 |
| Publisher: | The Japan Institute of Metals |
| Journal Title: | MATERIALS TRANSACTIONS |
| Volume: | 49 |
| Issue: | 11 |
| Start Page: | 2723 |
| End Page: | 2727 |
| Publisher DOI: | 10.2320/matertrans.MER2008188 |
| Abstract: | Microporous structures of nickel-aluminide thick films lining the inner wall of microchannels have been investigated. The microchannels were produced in metal bodies by a powder metallurgical process utilizing microscopic reactive infiltration. In the experiment, a nickel-powder compact containing shaped aluminum wires was sintered at a temperature between the melting points of nickel and aluminum. Infiltration and diffusion of aluminum into the surrounding nickel powder, accompanied by the reaction between the metals, occurred during the sintering and brought about the formation of microchannels lined with a NiAl intermetallic layer. In this process, nickel powder composed the device body, and the aluminum wires gave the shape of the microchannels. The intermetallic layer had a microporous structure when the diameter of the aluminum wire was 500 μm and the porosity of the compact specimen was 23.6–31.5% within the porosity range examined. When the porosity was 36.0%, such a structure, the porous thick film, was not observed. On the other hand, the porous NiAl thick film was produced in all specimens with an aluminum wire of 200 μm in diameter. The voidage of the porous thick film was maximized when the porosity of the compact specimen was 29.8%, and it reached to 53.8% in the case the diameter of the aluminum wire was 500 μm, and 60.2% in the case that was 200 μm. |
| Relation: | https://www.jstage.jst.go.jp/article/matertrans/49/11/49_MER2008188/_article/-char/ja |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74704 |
| 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
|
