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Synthesis of SiC Nanowires with In-Situ Deposition of Carbon Coating

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Abstract:

SiC nanowires are effective reinforcement materials in ceramic matrix composites. A compliant coating such as carbon on nanowires is necessary in order to moderate the nanowire/matrix interfacial bounding for taking the most advantages of SiC nanowires. SiC nanowires with an in-situ deposition of carbon shell coating were fabricated by a novel chemical vapor growth process. Highresolution transmission electron microscopy examinations showed that the nanowires consisted of a single crystal -SiC core with an amorphous carbon shell 2–5 nm in thickness. The nanowires were straight with a length generally over 10 m and a diameter 15–150 nm. The growth direction of the core SiC nanowires is 〈111〉. A simple three-step growth model for SiC nanowires was proposed based on a vapor–solid growth mechanism. Because the carbon-coated nanowires were grown directly on continuous Tyranno-SA SiC fibers, in-situ application of the present technique on the fabrication of SiC nanowire-reinforced SiC/SiC composites is expected.

Keywords: CARBON COATING; CHEMICAL VAPOR GROWTH PROCESS; SIC NANOWIRE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2005.024

Publication date: February 1, 2005

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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