Articles
  • Microstructure and properties of Web-type polycrystalline SiC fiber prepared by electrospinning and sintering of aluminum doped polycarbosilane 
  • Dong-Geun Shina, Yoon-Joo Leea, Eun-Ju Jinb, Kwang-Youn Choa, Younghee Kima, Soo-Ryong Kima, Woo-Teck Kwona, Jun-Sung Hongb and Doh-Hyung Riub,*
  • a Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology, 233-5 Gasan-dong, Guemcheon-gu, Seoul 153-801, Korea b Department of Materials Science and Engineering, Seoul National University of Technology, 172 Gongreung 2-dong, Nowon-gu, Seoul 139-743, Korea
Abstract
Fine diameter polycrystalline silicon carbide fibers were prepared by electrospinning and sintering of aluminum doped polycarbosilane. Fully dense and completely polycrystalline SiC fibers were obtained after sintering at 2000 degrees C. The diameter of the fibers was in the range of 0.5 to 2 mu m. The SiC crystallite size in the fiber sintered at 2000 degrees C was about 200 nm and many stacking faults and twins were observed inside the SiC crystallites. A residual carbon phase was segregated on the fiber surface and at the grain boundaries in the form of microcrystalline graphite. When oxidized at 1200 degrees C, the fiber showed good adhesion with the oxidation layer formed on the fiber surface.

Keywords: Polycrystalline SiC web; Electrospinning; Polyaluminocarbosilane; Sintering; Residual carbon; Energy efficiency

This Article

  • 2014; 15(5): 298-304

    Published on Oct 31, 2014

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