Oxidation-Resistant SiO2/SiC Coatings on Carbon Fiber Fabrics Prepared by Plasma Electrolysis Spray

Aiming Bu*, Yongfu Zhang, Yan Xiang, Yunjie Yang, Jingyu Deng, Junliang Shi, Weiwei Chen, Huanwu Cheng, Lu Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Abstract: The applications of carbon fibers are limited above 500 °C by their poor oxidation resistance in oxygen-containing atmosphere. In this study, oxidation-resistant SiO2/SiC coatings were synthesized on carbon fiber fabric by a novel plasma electrolysis spray process. The microstructure and properties of coatings prepared at different spray distances and different spray times were investigated. The coatings were mainly composed of SiO2 and SiC with a SiC content varying between about 15 and 95 wt.%. The optimal coating was obtained with a spray time of 30 s and a spray distance of 20 mm; it corresponded to an increase in the fabric burnt-out temperature by 320 °C. Additionally, the mass loss rate was only around 50% at 900 °C, while the bare carbon fiber was burnt out. The kinetics and thermodynamics processes were also investigated in order to understand this novel plasma electrolysis spray process. We believe that this process will find a wide range of applications in the surface modification of fibers. Graphic Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)1792-1803
Number of pages12
JournalJournal of Thermal Spray Technology
Volume29
Issue number7
DOIs
Publication statusPublished - 1 Oct 2020

Keywords

  • carbon fiber fabric
  • electrolytic plasma spraying
  • nano-SiO/SiC coating
  • oxidation-resistant coatings

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