Scholarlink

<p>Carbon fiber-reinforced polymer (CFRP) is used in spacecraft due to its excellent physical and mechanical properties. To improve its adaptability to the space environment, coatings are applied to its surface to alter its absorptivity–emissivity ratio. However, coatings applied directly to untreated CFRP surfaces exhibit poor bonding strength. To address this, this paper first compared and analyzed different laser surface texturing (LST) shapes, selecting the dimple pattern. Then, based on Response Surface Method, the influence of dimple LST parameters on both the texture geometry and the bonding strength of a plasma-sprayed aluminum (Al) coating on the textured CFRP surface was investigated. The results indicate that a texture spacing of 208&#xa0;µm and a carbon fiber crater depth-to-diameter ratio (D/d ratio) of 0.432 constitute the optimal parameter combination. Under these parameters, the bonding strength between the textured CFRP and the supersonic plasma-sprayed Al coating reached 2.966&#xa0;MPa. This represents a 420% increase compared to the non-textured sample (0.569&#xa0;MPa). The study found that the mechanism for the enhanced bonding strength involves two aspects: Firstly, LST increases the specific surface area of the CFRP. Secondly, LST generates numerous inter-fiber voids and exposes significant amounts of bare carbon fibers within the CFRP. These features form anchoring points for the coating. This provides a positive foundation for the further application of CFRP in spacecraft.</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

Study on Enhancement Bonding Strength Between Al Coating and CFRP Surface by Laser Texturing Method

  • 期刊论文

  • 发表日期：

    2026年4月6日

查看全文
  • Minshuai Yang,
  • Lei Jia,
  • Wenxiang Shu,
  • Gengchao He,
  • Haidou Wang,
  • Weiling Guo,
  • Zhiguo Xing

摘要

Carbon fiber-reinforced polymer (CFRP) is used in spacecraft due to its excellent physical and mechanical properties. To improve its adaptability to the space environment, coatings are applied to its surface to alter its absorptivity–emissivity ratio. However, coatings applied directly to untreated CFRP surfaces exhibit poor bonding strength. To address this, this paper first compared and analyzed different laser surface texturing (LST) shapes, selecting the dimple pattern. Then, based on Response Surface Method, the influence of dimple LST parameters on both the texture geometry and the bonding strength of a plasma-sprayed aluminum (Al) coating on the textured CFRP surface was investigated. The results indicate that a texture spacing of 208 µm and a carbon fiber crater depth-to-diameter ratio (D/d ratio) of 0.432 constitute the optimal parameter combination. Under these parameters, the bonding strength between the textured CFRP and the supersonic plasma-sprayed Al coating reached 2.966 MPa. This represents a 420% increase compared to the non-textured sample (0.569 MPa). The study found that the mechanism for the enhanced bonding strength involves two aspects: Firstly, LST increases the specific surface area of the CFRP. Secondly, LST generates numerous inter-fiber voids and exposes significant amounts of bare carbon fibers within the CFRP. These features form anchoring points for the coating. This provides a positive foundation for the further application of CFRP in spacecraft.