Synthesis and protium absorbing properties of vapor grown carbon nano-fibers grown by Fe-based catalyst

Hidehiro Kudo, Ken Unno, Atsunori Kamegawa, Hitoshi Takamura, Masuo Okada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Vapor grown carbon nano-fibers (VGCFs) were synthesized by using Fe ingots, Fe powders, nanocrystalline Fe91Zr7B2 and Fe75Si15B10 alloy catalysts with fine bcc-Fe grains (∼ 20 nm). The Fe particles worked as catalysts were formed by fracturing original Fe ingots, Fe powders, and nanocrystalline alloys before the formation of VGCFs. TEM and HREM observations indicated that VGCFs' structures turned out to be platelet type grown from Fe powders and Fe91Zr7B2, and the tubular type grown from nanocrystalline Fe75 Si15B10 alloy. In addition to these structures, VGCFs grown from Fe ingots exhibited herringbone and coil type structures. Diameter of VGCFs prepared from nanocrystalline Fe75Si15B10 alloy was smaller than that of grown from Fe91Zr7B2 alloy. This could be originated from the difference of fracturing process between nanocrystalline Fe91 Zr7 B2 and Fe75 Si15 B10 alloys. Protium absorbing properties of VGCFs were evaluated by a Siverts-type apparatus and electrochemical method. It turned out that VGCFs had little protium absorbing capacity.

Original languageEnglish
Pages (from-to)1127-1132
Number of pages6
JournalMaterials Transactions
Volume43
Issue number5
DOIs
Publication statusPublished - 2002 May

Keywords

  • Iron-based catalyst
  • Protium absorbing material
  • Vapor grown carbon nano-fiber

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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