Article

Fabrication in-situ SiC nanowires/SiC matrix composite by chemical vapour infiltration process

Micro-nano Components Materials Group, Materials Engineering Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
Materials Letters 01/2004; DOI: 10.1016/j.matlet.2004.05.059

ABSTRACT A SiC nanowires-reinforced SiC matrix composite was fabricated using chemical vapour infiltration (CVI) process. SiC nanowires with thin carbon coating were grown directly in a fibrous preform prior to the CVI matrix densification. The nanowires consist of single crystal β phase SiC and uniform carbon shell coating of ∼5 nm, with diameters of several tens to 100 nm. The volume fraction of the nanowires in the fabricated composite is ∼5%. Contributions of the nanowires to the mechanical properties of the composite are expected.

1 Bookmark
 · 
238 Views
  • Journal of The Ceramic Society of Japan - J CERAMIC SOC JPN. 01/2009; 117(1362):194-197.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: SiC with unique properties, such as wide band gap, excellent thermal conductivity, chemical inertness, high electron mobility, and biocompatibility, promises well for applications in microelectronics and optoelectronics, as well as nanocomposites. The chapter reviews the recent progress on one-dimensional SiC nanostructures in both experimental and theoretical level, including synthesis methods and some properties (field emission, optical, electronic transport, mechanical, photocatalyst, and hydrogen storage) of SiC nanowires. Importantly, some novel results on SiC nanowires were elucidated clearly in our laboratory. Personal remarks end with some views on development and application of one-dimensional SiC nanostructures.
    One-Dimensional Nanostructures. 01/2008;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A novel and simple sol–gel route has been used for the fabrication of composite structure composed of carbon fibers and silicon carbide nanowires embedded in dense silicon carbide matrix. The carbonaceous silica sol was impregnated in the carbon fiber preform at atmospheric pressure. The sol impregnated carbon preform was cured and heat treated to convert into silicon carbide. The analysis by X-ray diffraction, scanning electron microscopy, X-ray tomography, and transmission electron microscopy indicates that the impregnated carbonaceous silica gel converts to β-silicon carbide with dense and wire morphology. Different morphological silicon carbide was uniformly distributed inside carbon fiber preform and there was no degradation in thermophysical properties of carbon composite during processing. These results reveal high efficient reinforcement of different morphological silicon carbide in carbon composite, demonstrate a new mechanism of carbon composite reinforcement and suggest a new direction to carbon composite reinforcement. Graphical Abstract
    Journal of Materials Science 10/2014; 49(19). · 2.31 Impact Factor