Preparation and microstructure of Al2O3–SiO2–TiO2 coating on three-dimensional braided carbon fiber by sol–gel technology. (5th January 2016)

• Record Type: Journal Article
• Authors: Wang, Jingjing; Lin, Wensong; Yan, Xuezeng; Wu, Xiao; Wu, Fen; Yang, Yayun
• Is Part Of: Materials & design. Volume 89(2016)
• Page Start: 928
• Page End: 932
• Publication Date: 2016-01-05
• Subjects: Carbon fiber -- Al2O3–SiO2–TiO2 coating -- Microstructure -- Sol–gel processes; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.10.079
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Al2 O3 –SiO2 –TiO2 coatings were synthesized on the surface of three-dimensional (3-D) braided carbon fiber by the sol–gel method. The Al2 O3 –SiO2 –TiO2 coating was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The effect of immension–pyrolysis cycle, immension time and heat treatment temperature on the microstructures and phase composition of the coating was investigated. The mechanical properties of the carbon fiber coated with various coating thickness were also measured. The results showed that the good morphology of the coating obtained was use of heat treatment at 750 °C for 2 immension–pyrolysis cycles by the immersion time of 40 min per cycle. The thickness was about 150–1200 nm along with the increase of immersion time from 40 to 120 min. Tensile strength measurement revealed that the Al2 O3 –SiO2 –TiO2 coated carbon fiber maintained 96.8% of its original strength when the thickness of the coating was 470 nm. Graphical abstract: Schematic diagram of the formation process of Al2 O3 –SiO2 –TiO2 coating on carbon fiber and SEM images of the Al2 O3 –SiO2 –TiO2 coated carbon fiber with various immersion time: (a) 40 min, (b) 80 min, (c) 120 min. Highlights: The preparation of the Al2 O3 –SiO2 –TiO2 sol was formed at room temperature. The Al2 O3 –SiO2 –TiO2 coating sintered at low temperatures. The preparation process of the sol is a new simple sol–gel process. The coatings formed on the surface of 3-D braided carbon fiber. Stirring time and aging time of the sol preparation is short.