Characteristics and Microstructural Development of Cold-Sprayed Copper Coating on Aluminum
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- Fukumoto Shinji
- Graduate School of Engineering, Osaka University
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- Ohta Kengo
- Graduate School of Engineering, Osaka University
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- Yanagimoto Tatsunori
- Mitsubishi Electric Corporation
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- Kashiba Yoshihiro
- Graduate School of Engineering, Osaka University
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- Kikuchi Masao
- Mitsubishi Electric Corporation
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- Matsushima Michiya
- Graduate School of Engineering, Osaka University
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- Fujimoto Kozo
- Graduate School of Engineering, Osaka University
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Abstract
<p>The cold spray method is a coating process that should improve the wettability of solder to aluminum surfaces. In this study, Cu powder particles were deposited on commercially pure Al via cold spraying, and the characteristics and microstructural developments of the deposited layer, interface, and substrate were investigated. Cu coatings, with an electronic resistivity similar to that of commercial solder, could be formed on the Al substrate. Solid-state bonding was partially achieved between the Cu particles. Interdiffusion occurred at the interface between the cold sprayed Cu particles and the Al substrate, forming the reaction phases, and the Cu coating was bonded to Al substrate along almost the entire bond interface. The impact of high-velocity particles induced dynamic recrystallization and grain refinement of Al, resulting in increased hardness near the surface of the Al substrate. The thickness of the hardened region was ∼10 µm. Tin-based solder paste exhibited good wettability to the cold-sprayed Cu coating.</p>
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 60 (4), 602-610, 2019-04-01
The Japan Institute of Metals and Materials
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Details
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- CRID
- 1390282763116161408
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- NII Article ID
- 40021860699
- 130007618559
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 029621227
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed