Effect of Thiourea on the Properties of a Cu-Al₂O₃ Coating Prepared via Jet Electrodeposition

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  • Fan Hui
    Kewen College, School of Mechanical and Electrical Engineering, Jiangsu Normal University
  • Zhao Yangpei
    Jiang su Jiangzhu Institute
  • Cao Sainan
    Jiangsu Key Laboratory of 3D Printing Equipment and Application Technology, Nantong Institute of Technology
  • Li Zhijing
    Kewen College, School of Mechanical and Electrical Engineering, Jiangsu Normal University

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  • Effect of Thiourea on the Properties of a Cu–Al<sub>2</sub>O<sub>3</sub> Coating Prepared via Jet Electrodeposition

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<p>Cu–Al2O3 nanocomposite coatings were jet electrodeposited from an electrolyte containing Al2O3 nanoparticles and added thiourea. The effects of the thiourea concentration on the surface morphologies, microstructures, growth structures, incorporated Al2O3 nanoparticle contents, and mechanical performances of the composite coatings were examined. The results revealed that the adsorption of Al2O3 increased from 4.6 at% to 9.3 at% with the addition of thiourea, and grain refinement from 61 nm to 33 nm was achieved. Thiourea additions in the concentration range of 0–15 mg/L increased the microhardness by 79% compared with that of the coating fabricated without thiourea. The mechanisms by which thiourea influenced the deposition quality and mechanical properties of the coating are discussed.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (5), 802-807, 2019-05-01

    公益社団法人 日本金属学会

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