Carbon nanotubes

Amino functionalization and its application in the fabrication of Al-matrix composites

S. K. Singhal, Renu Pasricha, Mamta Jangra, Rajiv Chahal, Satish Teotia, R. B. Mathur

Research output: Contribution to journalArticle

Abstract

Al-matrix composites reinforced with amino-functionalized multiwalled carbon nanotubes (fCNTs) have been fabricated using the powder metallurgy process. Using this method fCNTs (1.5wt.%) were dispersed in Al powder by high energy ball milling. Al-fCNTs composites (1.5wt.%) were fabricated by the consolidation of powders at 550MPa followed by sintering at 620°C under a vacuum of 10 -2Torr for 2h. Functionalization of the nanotubes was carried out by ball milling multi-walled carbon nanotubes (MWCNTs) in the presence of ammonium bicarbonate. It was observed that the dispersion of fCNTs in Al-matrix was much higher than those of non-functionalized MWCNTs. Microhardness measurements showed that a microhardness value of about 400kg/mm 2 could be obtained for Al-matrix composites loaded with 1.5wt.% fCNTs. Microstructure observations using scanning electron microscopy (SEM) and high-resolution electron microscopy (HRTEM) confirmed that the sintered composites had a good dispersion of fCNTs in Al matrix and they do not agglomerate with each other. Further, the HRTEM characterization of these composites revealed the formation of a thin transition layer of Al 4C 3 between fCNTs and Al matrix, which is believed to be responsible for load transfer from Al matrix to fCNTs. A thorough characterization of MWCNTs and fCNTs synthesized in the present work was carried out using XRD, SEM, TGA, HRTEM, FTIR, SIMS and Raman spectroscopy.

Original languageEnglish (US)
Pages (from-to)254-263
Number of pages10
JournalPowder Technology
Volume215-216
DOIs
StatePublished - Jan 1 2012

Fingerprint

Carbon Nanotubes
Multiwalled carbon nanotubes (MWCN)
Carbon nanotubes
Fabrication
Composite materials
High resolution electron microscopy
Ball milling
Powders
Microhardness
Ammonium bicarbonate
Scanning electron microscopy
Powder metallurgy
Secondary ion mass spectrometry
Consolidation
Nanotubes
Raman spectroscopy
Sintering
Vacuum
Microstructure

Keywords

  • Carbon nanotubes
  • Dispersion
  • Mechanical properties
  • Metal matrix composites
  • Powder metallurgy

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Carbon nanotubes : Amino functionalization and its application in the fabrication of Al-matrix composites. / Singhal, S. K.; Pasricha, Renu; Jangra, Mamta; Chahal, Rajiv; Teotia, Satish; Mathur, R. B.

In: Powder Technology, Vol. 215-216, 01.01.2012, p. 254-263.

Research output: Contribution to journalArticle

Singhal, S. K. ; Pasricha, Renu ; Jangra, Mamta ; Chahal, Rajiv ; Teotia, Satish ; Mathur, R. B. / Carbon nanotubes : Amino functionalization and its application in the fabrication of Al-matrix composites. In: Powder Technology. 2012 ; Vol. 215-216. pp. 254-263.
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