A Concentrated AlCl₃–Diglyme Electrolyte for Hard and Corrosion-Resistant Aluminum Electrodeposits

• 張, 澤磊

  Department of Materials Science and Engineering, Kyoto University･College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics

• 北田, 敦

  Department of Materials Science and Engineering, Kyoto University

• 深見, 一弘

  Department of Materials Science and Engineering, Kyoto University

• 辻, 伸泰

  Department of Materials Science and Engineering, Kyoto University

• 邑瀬, 邦明

  Department of Materials Science and Engineering, Kyoto University

• Yao, Zhengjun

  College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics

• Murase, Kuniaki

  Department of Materials Science and Engineering, Kyoto University

書誌事項

タイトル別名

• A Concentrated AlCl3-Diglyme Electrolyte for Hard and Corrosion-Resistant Aluminum Electrodeposits

抄録

A concentrated aluminum chloride (AlCl3)-diglyme (G2) electrolyte is used to prepare hard and corrosion-resistant aluminum (Al) electrodeposited films. The Al electrodeposits obtained from the electrolyte with an AlCl3/G2 molar ratio x = 0.4 showed a void-free microstructure composed of spherical particles, in stark contrast to flake-like morphologies with micro-voids for lower x. Neutral complexes rarely exist in the x = 0.4 electrolyte, resulting in a relatively high conductivity despite the high concentration and high viscosity. Nanoindentation measurements for the Al deposits with >99% purity revealed that the nanohardness was 2.86 GPa, three times higher than that for Al materials produced through electrodeposition from a well-known ionic liquid bath or through severe plastic deformation. Additionally, the void-free Al deposits had a <100> preferential crystal orientation, which accounted for better resistance to free corrosion and pitting corrosion. Discussions about the compact microstructure and <100> crystal orientation of deposits obtained only from the x = 0.4 concentrated electrolyte are also presented.

収録刊行物

• ACS Applied Materials & Interfaces

  ACS Applied Materials & Interfaces 12 (38), 43289-43298, 2020-09-23

  American Chemical Society (ACS)

キーワード

• aluminum electrodeposition
• concentrated electrolyte
• diglyme
• hardness
• corrosion

詳細情報

• CRID: 1050849378438653696
• NII論文ID: 120007002691
• ISSN: 19448244
• ISSN: 19448252
• DOI: 10.1021/acsami.0c12602
• HANDLE: 2433/255857
• Web Site: http://pubs.acs.org/doi/pdf/10.1021/acsami.0c12602
• Web Site: https://pubs.acs.org/doi/pdf/10.1021/acsami.0c12602
• 本文言語コード: en
• 資料種別: journal article
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