Scholarlink

<p>FeCoNiCrCu and FeCoNiCrCuB<sub>0.03</sub>Si<sub>0.03</sub> high-entropy alloy (HEA) coatings were fabricated via annular oscillating laser deposition. The effects of B/Si co-doping on the phase composition, microstructure, and 500&#xa0;°C dry sliding tribological behaviors of the coatings were systematically investigated. Results demonstrated that B/Si addition retained the single face-centered cubic (FCC) solid solution structure, induced grain refinement and Cu grain-boundary segregation, and increased coating microhardness by 32%. However, it significantly degraded 500&#xa0;°C wear resistance, with the coefficient of friction (COF) and wear rate increasing by 26.9% and 244.4% under 20 N. This deterioration was dominated by synergistic protective oxide film failure caused by B<sub>2</sub>O<sub>3</sub> melting, SiO<sub>2</sub> thermal expansion mismatch and soft CuO formation, providing theoretical reference and data support for high-temperature HEA coating composition optimization.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of B and Si Addition on the Microstructure and High-Temperature Tribological Properties of FeCoNiCrCu High-Entropy Alloy Coatings

  • 期刊论文

  • 发表日期：

    2026年8月5日

查看全文
  • Xinyu Zhang,
  • Yining Hu,
  • Peipei Sun,
  • Lei Zhou,
  • Tao Wang

摘要

FeCoNiCrCu and FeCoNiCrCuB0.03Si0.03 high-entropy alloy (HEA) coatings were fabricated via annular oscillating laser deposition. The effects of B/Si co-doping on the phase composition, microstructure, and 500 °C dry sliding tribological behaviors of the coatings were systematically investigated. Results demonstrated that B/Si addition retained the single face-centered cubic (FCC) solid solution structure, induced grain refinement and Cu grain-boundary segregation, and increased coating microhardness by 32%. However, it significantly degraded 500 °C wear resistance, with the coefficient of friction (COF) and wear rate increasing by 26.9% and 244.4% under 20 N. This deterioration was dominated by synergistic protective oxide film failure caused by B2O3 melting, SiO2 thermal expansion mismatch and soft CuO formation, providing theoretical reference and data support for high-temperature HEA coating composition optimization.