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<p>The electric brush plays a crucial role in power transmission within machines, combining essential tribological and electrical properties. With the rising demand for renewable energy in transportation, efficient electrical energy transfer to and from batteries is increasingly vital. Manufacturers are looking for electric brushes to meet these demands. This study explores the impact of yttrium oxide (Y<sub>2</sub>O<sub>3</sub>) content on the chemical composition, microstructure, density, hardness, tribological, and electrical properties of the (Cu-0.5CNTs-10Ag) composite. The fabrication process involved mechanical alloy milling, electroless silver coating, and vacuum sintering. X-ray diffraction and energy-dispersive x-ray spectroscopy (EDX) confirmed the elemental presence before and after sintering, noting cuprite formation at higher Y<sub>2</sub>O<sub>3</sub> levels. Relative density decreased as Y<sub>2</sub>O<sub>3</sub> content increased, with noticeable Y<sub>2</sub>O<sub>3</sub> agglomeration at 12%. Hardness increased up to 6% Y<sub>2</sub>O<sub>3</sub> and then declined. The wear rate increased with load but decreased as the Y<sub>2</sub>O<sub>3</sub> content reached 6%. Samples with 3% and 6% Y<sub>2</sub>O<sub>3</sub> exhibited a lower coefficient of friction (COF), with values of 0.17 compared to 0.43 for Cu-10Ag-0.5CNTs. Electrical conductivity declined from 94% IACS for copper to 84% IACS at 12 wt.% Y<sub>2</sub>O<sub>3</sub>. This study provides insights into optimizing electric brush compositions, highlighting the role of Y<sub>2</sub>O<sub>3</sub> in enhancing mechanical, tribological, and electrical performance for future power transmission applications.</p> Graphical Abstract <p></p>

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Influence of Y2O3 Additions on the Tribological and Electrical Performance of Cu-Carbon Nanotube/Ag Nanocomposite for Electrical Brushes

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • A. M. I. Abu-Oqail,
  • Hossam M. Yehia,
  • Mostafa Wageh Lotfy,
  • I. A. Rehab,
  • W. M. Farouk,
  • Mamdouh I. Elamy,
  • Mohamed Abu-Okail

摘要

The electric brush plays a crucial role in power transmission within machines, combining essential tribological and electrical properties. With the rising demand for renewable energy in transportation, efficient electrical energy transfer to and from batteries is increasingly vital. Manufacturers are looking for electric brushes to meet these demands. This study explores the impact of yttrium oxide (Y2O3) content on the chemical composition, microstructure, density, hardness, tribological, and electrical properties of the (Cu-0.5CNTs-10Ag) composite. The fabrication process involved mechanical alloy milling, electroless silver coating, and vacuum sintering. X-ray diffraction and energy-dispersive x-ray spectroscopy (EDX) confirmed the elemental presence before and after sintering, noting cuprite formation at higher Y2O3 levels. Relative density decreased as Y2O3 content increased, with noticeable Y2O3 agglomeration at 12%. Hardness increased up to 6% Y2O3 and then declined. The wear rate increased with load but decreased as the Y2O3 content reached 6%. Samples with 3% and 6% Y2O3 exhibited a lower coefficient of friction (COF), with values of 0.17 compared to 0.43 for Cu-10Ag-0.5CNTs. Electrical conductivity declined from 94% IACS for copper to 84% IACS at 12 wt.% Y2O3. This study provides insights into optimizing electric brush compositions, highlighting the role of Y2O3 in enhancing mechanical, tribological, and electrical performance for future power transmission applications.

Graphical Abstract