Preparation of Continuous Al₂O₃/Y₂O₃ Coating on Carbon Fiber by a Novel Aqueous Plasma Electrolysis

Abstract:

A novel aqueous plasma electrolysis applied for depositing a uniform and continuous Al₂O₃/Y₂O₃ ceramic coating on each fiber within a carbon fiber bundle are reported in this study. All equally spaced tungsten wires generated plasma arc, where the plasma was overlapped, excluded and extruded each other, finally a cylindrical plasma arc zone was formed, promoting the full coverage of the coating on each fiber. The Al₂O₃/Y₂O₃ coating protected the carbon fiber from oxidation above 850^oC. Similarly, the coating significantly improved the oxidation resistance of the carbon fiber with the mass loss of ~5% after isothermal oxidation in N₂ atmosphere at 800°C for 30 min, compared to ~14% of bare carbon fiber. By the movement of the T300 carbon fiber bundle, 1500 m coated carbon fiber bundle with the high-quality Al₂O₃/Y₂O₃ coating deposited on each fiber was successfully realized. It is believed that the novel aqueous plasma electrolysis will find a wide range of applications in modifying the interface of the carbon fiber reinforced composites. The present investigation will also open up a new horizon for preparing a protective coating on each fiber within two/three-dimensional carbon fiber fabric.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1575-1582
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1575
• Online since: June 2017
• Authors: Yu Ping Zhang, Yong Hua Shen, Wei Wei Chen*, Huan Wu Cheng, Lu Wang
• Keywords: Al₂O₃/Y₂O₃ Coating, Carbon Fiber, Oxidation Resistance, Plasma Electrolysis

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