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Peer-reviewed Journal Articles, etc >
Formation of Al-Ni Intermetallic Layers Lining Microchannels Produced by Powder-Metallurgical Process Using Aluminum Sacrificial Cores
| Title: | Formation of Al-Ni Intermetallic Layers Lining Microchannels Produced by Powder-Metallurgical Process Using Aluminum Sacrificial Cores |
| Authors: | Ohmi, Tatsuya Browse this author →KAKEN DB | | Hayashi, Naoya Browse this author |
| Keywords: | microchannel device | | microchannel heat exchanger | | microreactor lining | | microporous structure | | intermetallic compound | | nickel aluminide | | powder metallurgy | | unequal diffusion rates | | Kirkendall voids |
| Issue Date: | 1-Oct-2016 |
| Publisher: | The Japan Institute of Metals and Materials |
| Journal Title: | MATERIALS TRANSACTIONS |
| Volume: | 57 |
| Issue: | 10 |
| Start Page: | 1816 |
| End Page: | 1822 |
| Publisher DOI: | 10.2320/matertrans.M2016206 |
| Abstract: | The mechanism of in-situ formation of Al-Ni intermetallic lining layers during microchannel formation in nickel bodies by a powder-metallurgical process has been investigated. Aluminum wire was used as a sacrificial core that gives the shape of the microchannel and supplies the alloying element for the lining layer. Nickel powder compacts with 29(±1)% porosity containing aluminum wires were heated from room temperature and then quenched at various temperatures between 873 K and 1473 K. Porous intermetallic lining layers were clearly recognized at temperatures above 1073 K. Each lining layer was built up from an outward-growing layer and an inward-growing layer. Change in the voidage in the outward-growing layer during heat treatment and the formation of a high-voidage zone around the lining layer were accounted for in terms of phase equilibria and unequal diffusion rates of the alloy elements in the Al-Ni intermetallic compounds and nickel solid solution. |
| Relation: | https://www.jstage.jst.go.jp/article/matertrans/57/10/57_M2016206/_article |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74703 |
| 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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