Carbon nanofiber reinforced aluminum matrix composite fabricated by combined process of spark plasma sintering and hot extrusion

Hansang Kwon, Hiroki Kurita, Marc Leparoux, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Spark plasma sintering and hot extrusion processes have been employed for fabricating carbon nanofiber (CNF)-aluminum (Al) matrix bulk materials. The Al powder and the CNFs were mixed in a mixing medium of natural rubber. The CNFs were well dispersed onto the Al particles. After removal of the natural rubber, the Al-CNF mixture powders were highly densified. From the microstructural viewpoint, the composite materials were observed by optical, field-emission scanning electron, and high-resolution transmission electron microscopies. The CNFs were found to be located on every grain boundary and aligned with the extrusion direction of the Al-CNF bulk materials. Some Al carbides (Al 4C 3) were also observed at the surface of the CNFs. This carbide was created by a reaction between the Al and the disordered CNF. The CNFs and the formation of Al 4C 3 play an important role in the enhancement of the mechanical properties of the Al-CNF bulk material. The CNFs can also be used for engineering reinforcement of other matrix materials such as ceramics, polymers and more complex matrices.

Original languageEnglish
Pages (from-to)4119-4126
Number of pages8
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number5
DOIs
Publication statusPublished - 2011 May

Keywords

  • Carbon nanofiber (CNF)
  • Hot extrusion
  • Mechanical properties
  • Metal matrix composites
  • Spark plasma sintering (SPS)

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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