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Fabrication of Al2O3–SiCw protective coatings on carbon fiber by the sol-spraying method

  • Xueni Zhao
  • Fuzhen He
  • Li Zhang
  • Jianjun Yang
  • Xudong Wang
  • Yao Wang
  • Weigang Zhang
  • Qingyao Liu
Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
  • 9 Downloads

Abstract

Carbon fiber (CF) reinforced hydroxyapatite (HA) composites (CF/HA) are candidate materials for loaded human bones because of their excellent biocompatibility. To prevent the oxidation of CF during sintering process of CF/HA composites, the uniform, dense and continuous Al2O3 coating reinforced by SiCw (Al2O3–SiCw) were successfully fabricated via the sol-spraying method. CF was treated by ultrasound-assisted anodic oxidation treatment (CFU2) before sol-spraying to obtain good interfacial adhesion between the coatings and CFU2. The results show that ultrasound-assisted anodic oxidation treatment can significantly increase O-containing functional groups, surface energy, and roughness of CFU2 surface. The oxidation resistance of CFU2 can be significantly improved by Al2O3–SiCw coatings obtained by three coating times of sol-spraying. The adhesion between Al2O3–SiCw coatings and CFU2 is strong enough to make 3(Al2O3–SiCw)/CFU2 satisfy the need of reinforced fibers. The SiCw in Al2O3–SiCw coatings can prevent the growth of cracks and improve the cohesion of coatings and achieve effective protection. The introduction of Al2O3–SiCw coatings onto CFU2 surface is an effective way to prevent oxidative damage of CFU2. When the Al2O3–SiCw/CFU2 was used to reinforce HA (CFU2/Al2O3–SiCw/HA composites), the compressive strength of composites reaches 74.5 MPa, which is almost 2.7 times that of CF/HA.

The uniform, dense and continuous Al2O3 coating reinforced by SiCw (Al2O3–SiCw) was fabricated via the sol-spraying method. The SiCw in Al2O3–SiCw coatings can prevent the growth of cracks, improve the cohesion of coatings. Due to effective protection of Al2O3–SiCw coatings to CFU2 during sintering, compressive strength of the Al2O3–SiCw/CFU2 reinforced HA composites is almost 2.7 times that of CF/HA.

Highlights

  1. 1.

    The Al2O3–SiCw coatings were prepared on micro-sized CF via the sol-spraying method.

     
  2. 2.

    CF was treated to obtain good interfacial adhesion between coatings and CF.

     
  3. 3.

    The oxidation resistance of CF was improved by Al2O3–SiCw coatings.

     
  4. 4.

    The possible coating mechanism and protection mechanism of coatings were investigated.

     
  5. 5.

    Compressive strength of Al2O3–SiCw coated CF reinforced HA is almost 2.7 times that of CF/HA.

     

Keywords

Carbon fiber Anodic oxidation treatment Sol-spraying Al2O3–SiCw coatings Hydroxyapatite Composites 

Notes

Acknowledgments

The work was supported by the National Natural Science Foundation of China under Grant nos. 51772179 and 51072107, the fund of the State Key Laboratory of Solidification Processing in NWPU under Grant nos. SKLSP201823, the Natural Science Basic Research Plan in Shaanxi Province of China under Grant no. 2014JM6233, the Academic Backbone Training Program of Shaanxi University of Science and Technology, China (Grant no. XSGP201208), and the PhD research startup foundation of Shaanxi University of Science and Technology, China (Grant no. BJ13-09).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Xueni Zhao
    • 1
  • Fuzhen He
    • 1
  • Li Zhang
    • 1
  • Jianjun Yang
    • 1
  • Xudong Wang
    • 1
  • Yao Wang
    • 1
  • Weigang Zhang
    • 1
  • Qingyao Liu
    • 1
  1. 1.College of Mechanical and Electrical EngineeringShaanxi University of Science and TechnologyXi’anChina

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