Carbon nanotube reinforced metalmatrix composites by novel powder metallurgical process

Hansang Kwon, Akira Kawasaki

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

Abstract

Aluminum /carbon nanotube (CNT) composites with nanoscale dispersion and regular orientation of CNTs have been fabricated by a combination of spark plasma sintering and hot-extrusion processes. The CNTs were well dispersed onto Al particles by a nanoscale dispersion method. The highly densified CNT composites were prepared by spark plasma sintering and subsequent hot extrusion. Microstructural observations by optical, fieldemission scanning electron and high-resolution transmission electron microscopies confirmed that the sintered Al/CNT compact and extruded bulk material has a good dispersion of oriented CNTs. Raman spectroscopy showed that the processing restrained damage to the CNTs. A small amount of transient Al liquid phase was formed during SPS sintering, which may assist the densification as well as local formation of Aluminum carbides on the CNTs. As a result, the composites exhibited three times larger tensile strength than pure aluminum because of the reinforcement of the CNTs.

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2014, Proceedings of the 2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014
PublisherMetal Powder Industries Federation
Pages9161-9165
Number of pages5
ISBN (Electronic)0985339764, 9780985339760
Publication statusPublished - 2014 Jan 1
Event2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014 - Orlando, United States
Duration: 2014 May 182014 May 22

Publication series

NameAdvances in Powder Metallurgy and Particulate Materials - 2014, Proceedings of the 2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014

Other

Other2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014
CountryUnited States
CityOrlando
Period14/5/1814/5/22

Keywords

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

ASJC Scopus subject areas

  • Materials Chemistry
  • Metals and Alloys
  • Surfaces and Interfaces

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