An in-situ CVD coating of aluminum on VGCF for the fabrication of Al-VGCF composites

Fumio Ogawa*, Kazuya Hirakawa, Chitoshi Masuda

*この研究の対応する著者

研究成果査読

3 被引用数 (Scopus)

抄録

In-situ chemical vapor deposition (CVD) of aluminum on vapor grown carbon fibers (VGCF) was investigated for the fabrication of Al-VGCF composites. Reaction of aluminum powder with iodine was used to produce the aluminum vapor source. Aluminum powder, VGCF and iodine powder were placed into quartz tubes in various molar ratios and the quartz tubes were sealed in vacuum. Then they were annealed in the furnace. Annealing temperature was 673K or 773K. Obained powder was observed using a field emission transmission electron microscope (FETEM). Coated layer was successfully formed on VGCF using a molar ratio of VGCF : aluminum : iodine of 1 : 1 : 0.1 under an annealing temperature of 773K for 1.728 × 10 5s. The coated layer was proved to be aluminum by characterization of crystal and chemical structure using X-ray diffraction, Fourier transform-infrared spectroscopy, and X-ray photoelectron spectroscopy. As a result of high resolution transmission electron microscope observation, mild reaction of VGCF with the aluminum coated layer at the interface, accompanied with formation of the interlayer (reaction layer) was evident. Detailed observation of the graphitic layers of VGCF revealed that graphitic layers on VGCF surface are slightly consumed due to reaction with aluminum. Crystal structure of the interlayer was determined to be aluminum oxycarbides (Al 4O 4C, Al 2OC), by measurement of lattice spacing. It was also made clear that the interface (interlayer) formation process is strongly dominated by the surface structure of the VGCF.

本文言語English
ページ(範囲)454-461
ページ数8
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
61
5
DOI
出版ステータスPublished - 2012 5

ASJC Scopus subject areas

  • 材料科学(全般)
  • 機械工学
  • 材料力学
  • 凝縮系物理学

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