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<p>This study explores the tribological and mechanical properties of epoxy composites reinforced with barium titanate (BT; BaTiO<sub>3</sub>) and calcium copper titanate (CCTO; CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>). Various proportions of BT and CCTO (100:0, 40:60, 50:50, 60:40, 0:100) were mixed with epoxy resin matrix in a 20:80 ratio, forming requisite composite samples via compression molding. First, the density, microhardness, tensile, flexural, and impact tests were conducted following ASTM standards. The 60:40 BT and CCTO ratios showed superior mechanical performance in tensile, flexural, impact, and microhardness properties with 12.258%, 46.723%, 21.739%, and 27.405% enhancements, respectively. Subsequently, dry sliding wear tests were performed using a pin-on-disc wear test rig under three loads (10 N, 15 N, 20 N) and velocities (2&#xa0;m/s, 2.5&#xa0;m/s, 3&#xa0;m/s) with a constant sliding distance of 500&#xa0;m. The results indicated a gradual reduction in wear rate under dry sliding conditions with increasing normal load and sliding velocity, regardless of the BT and CCTO proportions, with the 60:40 ratio demonstrating optimal wear resistance. Field-emission scanning electron microscopy (FESEM) analysis of the worn surface morphology revealed that adhesion, abrasion, and micro-ploughing of BT/CCTO in epoxy predominantly influenced the composite sample wear performance. These findings contribute to the advancement of high-performance and durable hybrid filler variant epoxy composites for electrical, microelectronic, and telecommunication applications.</p>

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Hybrid Epoxy/(BaTiO3 + CaCu3Ti4O12) Composites for Electronics Applications: Mechanical and Dry Sliding Wear Properties

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • Ajit Kumar Behera,
  • Punyapriya Mishra,
  • Trupti Ranjan Mahapatra,
  • Punyatoya Mishra,
  • Debadutta Mishra

摘要

This study explores the tribological and mechanical properties of epoxy composites reinforced with barium titanate (BT; BaTiO3) and calcium copper titanate (CCTO; CaCu3Ti4O12). Various proportions of BT and CCTO (100:0, 40:60, 50:50, 60:40, 0:100) were mixed with epoxy resin matrix in a 20:80 ratio, forming requisite composite samples via compression molding. First, the density, microhardness, tensile, flexural, and impact tests were conducted following ASTM standards. The 60:40 BT and CCTO ratios showed superior mechanical performance in tensile, flexural, impact, and microhardness properties with 12.258%, 46.723%, 21.739%, and 27.405% enhancements, respectively. Subsequently, dry sliding wear tests were performed using a pin-on-disc wear test rig under three loads (10 N, 15 N, 20 N) and velocities (2 m/s, 2.5 m/s, 3 m/s) with a constant sliding distance of 500 m. The results indicated a gradual reduction in wear rate under dry sliding conditions with increasing normal load and sliding velocity, regardless of the BT and CCTO proportions, with the 60:40 ratio demonstrating optimal wear resistance. Field-emission scanning electron microscopy (FESEM) analysis of the worn surface morphology revealed that adhesion, abrasion, and micro-ploughing of BT/CCTO in epoxy predominantly influenced the composite sample wear performance. These findings contribute to the advancement of high-performance and durable hybrid filler variant epoxy composites for electrical, microelectronic, and telecommunication applications.