Fabrication of carbon nanotube reinforced aluminum matrix composite by spark plasma sintering and hot extrusion hybrid process

Hiroki Kurita, Hansang Kwon, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Carbon nanotubes (CNTs) with their outstanding properties are expected as reinforcement for conventional materials, though they are required to be uniformly dispersed with the host matrix. However, uniform dispersion of CNTs within metal and ceramic-based materials is highly challenging to achieve due to strong van der Waal's forces between the neighboring CNTs leading to strong CNT agglomeration. We fabricated fully dense, uniformly dispersed 1.0 and 5.0 vol% CNT-aluminum matrix composite by combination of hetero agglomeration method and spark plasma sintering (SPS) followed by hot extrusion process. Tensile response and microstructure of the composites were studied by the universal Instron tester and transmission electron microscope, respectively. We realized a considerable enhancement in tensile strength of the composites while reaching the same rapture elongation for the 1.0 vol% CNT composite as the cast pure aluminum, however, the rupture elongation for the 5.0 vol% CNT composite was reduced. Although the aluminum was infiltrated into the surface defects of CNTs after the SPS, however, no Al4C3 phase was observed at the CNT/aluminum interface.

Original languageEnglish
Pages (from-to)259-264
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume75
Issue number4
DOIs
Publication statusPublished - 2011 Apr

Keywords

  • Carbon nanotube
  • Metal matrix composite
  • Powder metallurgy
  • Spark plasma sintering
  • Tensile strength

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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