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<p>The aim of this paper is to investigate the electrical properties of electrical brushes prepared from Ni/Cu/Sn-coated graphite powders, to clarify the main causes of brush wear and to propose a way to improve the electrical properties of electrical brushes. In this paper, the electrical properties of a three-step electroless coating and a conventional copper–graphite brush fabricated by plasma sintering, and the arc discharge and temperature rise relationship of the brush are analysed and compared. As a result, the electrical brushes prepared from Ni/Cu/Sn-coated graphite powders usually have excellent electrical properties compared to copper–graphite brushes, and the contact resistance is 1.45&#xa0;Ω, the arc discharge energy is 14.7&#xa0;kJ, and the wear rate is 6.9&#xa0;mg/h, reaching the optimum value. The low contact resistance and excellent electrical conductivity of the brushes prepared from Ni/Cu/Sn-coated graphite powders make them useful for the fabrication of electrical contact materials, including motor-triggered brushes.</p>

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Electrical Performance of Electrical Brush Fabricated by Three-Step Electroless Plating Method

  • 期刊论文

  • 发表日期：

    2026年3月8日

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  • Yong Nam Oh,
  • Son Il Hong,
  • Chan Il Ri,
  • Jong Su Pak,
  • Dong Chol Sin,
  • Jong Chol Nam,
  • Ryong Jon Han

摘要

The aim of this paper is to investigate the electrical properties of electrical brushes prepared from Ni/Cu/Sn-coated graphite powders, to clarify the main causes of brush wear and to propose a way to improve the electrical properties of electrical brushes. In this paper, the electrical properties of a three-step electroless coating and a conventional copper–graphite brush fabricated by plasma sintering, and the arc discharge and temperature rise relationship of the brush are analysed and compared. As a result, the electrical brushes prepared from Ni/Cu/Sn-coated graphite powders usually have excellent electrical properties compared to copper–graphite brushes, and the contact resistance is 1.45 Ω, the arc discharge energy is 14.7 kJ, and the wear rate is 6.9 mg/h, reaching the optimum value. The low contact resistance and excellent electrical conductivity of the brushes prepared from Ni/Cu/Sn-coated graphite powders make them useful for the fabrication of electrical contact materials, including motor-triggered brushes.