Synthesis of vapor - Grown carbon fibers using nanocrystalline Fe91Zr7B2 alloy as a catalyst

Ken Unno, Hidehiro Kudo, Atsunori Kamegawa, Hitoshi Takamura, Masuo Okada, Yoshinori Watanabe, Reijiro Takahashi, Junichiro Yagi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The synthesis of vapor-grown carbon fibers (VGCFs) using the nanocrystalline Fe91Zr7B2 alloy as a novel catalyst, and the growth process of these VGCFs, have been investigated. We selected the nanocrystalline Fe91Zr7B2 alloy as a novel catalyst for VGCF synthesis. The nanocrystalline Fe91Zr7B2 alloy with fine bcc-Fe grains (∼20nm) was prepared by a melt-spinning technique followed by annealing at 873 K for 5 min. VGCFs with a width ranging from 50 to 300nm and a maximum length of about 6μm were successfully prepared, by using a nanocrystalline Fe91Zr7B2 alloy annealed at 873 K under a 80%CO-20%H2 mixture. From HREM observation, it was found that the catalyst particle was made of fine bcc-Fe grains, and the VGCF consisted of graphite platelets with the spacing 0.396 nm, that were stacked in a direction parallel to the base of the catalyst particle and perpendicular to the fiber axis. The growth process of the VGCF using the nanocrystalline Fe91Zr7B2 alloy can be described by two major stages, i.e., "the separation of catalyst particles" and "fiber growth."

Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalMaterials Transactions, JIM
Volume41
Issue number5
DOIs
Publication statusPublished - 2000 May

Keywords

  • Carbon monoxide
  • Catalyst
  • Growth process
  • Growth rate
  • Hydrogen
  • VGCF
  • Vapor-grown carbon fiber

ASJC Scopus subject areas

  • Engineering(all)

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