Bibliographic Details
| Title: |
The growth and morphology of core/shell heterostructured conical carbon fibers |
| Authors: |
Lee, Woo Jin1, Li, Chao’en1, Burke, Nick1, Trimm, David1, Patel, Jim Jim.Patel@csiro.au |
| Source: |
Carbon. Jul2011, Vol. 49 Issue 8, p2735-2741. 7p. |
| Subjects: |
Heterostructures, Carbon fibers, Silicon carbide, Hydrocarbons, Oxidation, Combustion, Methane |
| Abstract: |
Abstract: Core/shell heterostructured conical carbon fibers with silicon-based cores and graphitic carbon sheaths have been grown on silicon carbide (SiC) surfaces exposed to the combustion of methane. The conical carbon fibers (CCFs), which taper from a circular base to a point, appear to form by two simultaneous growth processes, axial tip-growth and radial fiber thickening. Radial fiber thickening results from pyrolytic carbon deposition from gas-phase hydrocarbons. Oxidation of SiC surfaces is proposed to produce gas-phase silicon oxides, which feed axial tip-growth and install the silicon-based core. The unusual morphology of the CCFs, including bending, branching, curving and tapering, is proposed to result from the action and interplay of these two simultaneous processes. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
