Carbon nanotube reinforced aluminum matrix composites prepared by combination of spark plasma sintering and hot extrusion

Hansang Kwon, Akira Kawasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Aluminum (Al)/carbon nanotube (CNT) composites were fabricated by a combination of some advanced powder processes. The CNTs were well dispersed onto the Al particles by a nanoscale dispersion method. The pre-sintered CNT composites prepared by spark plasma sintering were used for subsequent hot extrusion. Microstructural observations by optical, field-emission scanning electron, and high-resolution transmission electron microscope confirmed that the sintered Al/CNT compact and extruded bulk material had a good dispersion of oriented CNTs. Raman spectroscopy showed that the processing did little damage to the CNTs. It is noticed that the Al-CNT composite showed no decrease in elongation despite highly enhanced tensile strength compared to that of pure Al. We believe that the thickness of boundary layer could be controlled by the amount of CNT which leads to well aligned CNT in the extrusion direction and also good adhesion between matrix and CNT due to generated aluminum carbide in Al-CNT composite.

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2009, Proceedings of the 2009 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2009
Pages9110-9116
Number of pages7
Publication statusPublished - 2009 Dec 1
Event2009 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2009 - Las Vegas, NV, United States
Duration: 2009 Jun 282009 Jul 1

Other

Other2009 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2009
CountryUnited States
CityLas Vegas, NV
Period09/6/2809/7/1

Keywords

  • Carbon nanotube
  • Hot-extrusion
  • Interfacial control
  • Metal matrix composite
  • Nanocomposite
  • Spark plasma sintering
  • Tensile strength

ASJC Scopus subject areas

  • Metals and Alloys
  • Surfaces and Interfaces

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