TUNGSTEN CARBIDE-SILICON CARBIDE NANOCOMPOSITE FIBRES PREPARED FROM TUNGSTEN NANOPARTICLE DISPERSED POLYCARBOSILANE BY ELECTROSPINNING

• Published in: Journal of Ceramic Processing Research Vol. 14; no. 4; pp. 463 - 467
• Main Authors: Shin, D-G, Cho, K-Y, Jin, E-J, Kim, Y, Kim, S-R, Kwon, W-T, Lee, Y-J, Hong, J-S, Riu, D-H
• Format: Journal Article
• Language: English
• Published: 청정에너지연구소 2013
• Subjects: Dispersion; Electrospinning; Fibers; Fibres; Nanostructure; Polycarbosilanes; Pyrolysis; Silicon carbide; 재료공학
• ISSN: 1229-9162; 2672-152X
• DOI: 10.36410/jcpr.2013.14.4.463

Tungsten carbide is of interest as a catalytic material for fuel cells, electronic devices and diesel particulate filters, and fine SiC fibres make very useful catalyst supports. W2C-SiC nanocomposite fibres were fabricated by electrospinning and pyrolysis using tungsten nanoparticle (nW; diameter, 3-5 nm) dispersed polycarbosilane solution. The nW was uniformly dispersed in the electrospun polycarbosilane fibres and transformed into alpha-W2C during pyrolysis at 1200 C, where the polycarbosilane-derived SiC fibres acted as a source of carbon and as an effective support for the alpha-W2C nanoparticles, preventing them from converting into another phase at 1200 C. A part of the nW dispersed on the fibre surface is considered to transform into alpha-W2C at the early stages of pyrolysis by carburisation with the gases evolved during the pyrolytic decomposition of polycarbosilane, such as CH4.