Catalytic effects of metal carbides, oxides and Ni single crystal on the vapor growth of micro-coiled carbon fibers
✍ Scribed by S. Motojima; S. Asakura; T. Kasemura; S. Takeuchi; H. Iwanaga
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 584 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
Micro-coiled carbon fibers were prepared by the impurity-activated chemical vapor deposition using the powders of metal carbides, metal oxides, and a Ni single crystal. The catalytic effect of these impurities on the coil yield and morphology were examined, and the growth mechanism is discussed. The pre-oxidized Ti plate, Ti203 and TiC powders, and a Ni single crystal as well as various metal powders provided the micro-coiled carbon fibers. For the Ni single crystal, the Ni(lOO) crystal gave the highest coil yield followed by Ni( 1ll)and then Ni( 110). It is considered that the anisotropic deposition rate of a carbon among the Ni single crystal planes is the driving force of the coiling of carbon fibers to form the coiled fibers.
Key Words-Carbon fiber, vapor grown carbon fiber (VGCF), coiled fiber, acetylene, chemical vapor deposition (CVD).