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<p>In this study, (FeCoNiCrMo + Ti<sub><i>X</i></sub>) alloy coatings (<i>x</i> = 0, 0.5, 1.0, 1.5) were successfully deposited on carbon fiber-reinforced polymer (CFRP) substrates via plasma spraying. The objective was to enhance the surface hardness and wear resistance of CFRP, while systematically investigating the effects of Ti content on the coating’s microstructure and mechanical performance. The results show that the (FeCoNiCrMo + Ti<sub><i>X</i></sub>) coatings significantly improve the surface hardness and wear resistance of CFRP. The addition of Ti leads to the formation of a dark region in the coating due to its high reactivity, which promotes reactions with certain metallic elements. Consequently, the FCC2 phase disappears, and new phases such as BCC, Laves, and trace amounts of TiO<sub>2</sub> are formed, affecting the oxidation behavior of elements like Cr and Fe. These phase transitions and solid solution strengthening effects not only improve the coating’s hardness and wear resistance, but also impact the interfacial bonding strength. The Ti<sub>1.5</sub> coating achieved a microhardness of 838.8 HV<sub>0.1</sub>, representing a 13.3% improvement over the original coating, and demonstrated approximately 53.4 times greater wear resistance, with the wear rate reduced to 8.17 × 10<sup>−6</sup>&#xa0;mm<sup>3</sup>&#xa0;N<sup>−1</sup>&#xa0;m<sup>−1</sup>.The Ti<sub>0.5</sub> coating showed the lowest porosity (1.27%) and the highest interfacial bonding strength (26.2&#xa0;MPa). Overall, the (FeCoNiCrMo + Ti<sub>1.0</sub>) coating exhibited relatively balanced performance across key metrics.</p>

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Microstructure and Properties of Plasma-Sprayed (FeCoNiCrMo + TiX) Coatings on CFRP Surfaces

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Qingchen Meng,
  • Jiacheng Feng,
  • Yupeng Li,
  • Wenbiao Gong,
  • Jinxin Liu,
  • Wenxuan Liu

摘要

In this study, (FeCoNiCrMo + TiX) alloy coatings (x = 0, 0.5, 1.0, 1.5) were successfully deposited on carbon fiber-reinforced polymer (CFRP) substrates via plasma spraying. The objective was to enhance the surface hardness and wear resistance of CFRP, while systematically investigating the effects of Ti content on the coating’s microstructure and mechanical performance. The results show that the (FeCoNiCrMo + TiX) coatings significantly improve the surface hardness and wear resistance of CFRP. The addition of Ti leads to the formation of a dark region in the coating due to its high reactivity, which promotes reactions with certain metallic elements. Consequently, the FCC2 phase disappears, and new phases such as BCC, Laves, and trace amounts of TiO2 are formed, affecting the oxidation behavior of elements like Cr and Fe. These phase transitions and solid solution strengthening effects not only improve the coating’s hardness and wear resistance, but also impact the interfacial bonding strength. The Ti1.5 coating achieved a microhardness of 838.8 HV0.1, representing a 13.3% improvement over the original coating, and demonstrated approximately 53.4 times greater wear resistance, with the wear rate reduced to 8.17 × 10−6 mm3 N−1 m−1.The Ti0.5 coating showed the lowest porosity (1.27%) and the highest interfacial bonding strength (26.2 MPa). Overall, the (FeCoNiCrMo + Ti1.0) coating exhibited relatively balanced performance across key metrics.