Fabrication and properties of aluminum-carbon nanotube accumulative roll bonded composites

• Author / Creator

  Salimi, Sahar

• Accumulative roll bonding was adapted to fabricate a carbon nanotube reinforced aluminum matrix composite. The microstructure was investigated by transmission electron microscopy, and it was confirmed that the nanotubes were embedded into the metal matrix while maintaining their multiwalled structure. Measurements revealed that the as-received carbon nanotubes had a bimodal diameter size distribution, while only nanotubes with diameters >30 nm and more than 30 walls were retained during four consecutive rolling operations at 50% reduction. The elastic deflection and vibration damping properties of the laminated composite were investigated by cantilever bending test and by impulse excitation method in samples with different concentrations of carbon nanotubes. Measurements by both methods revealed that a 0.23wt% concentration of nanotubes increased the elastic modulus according to the rule of mixtures and the damping behavior of the composites increased by the addition of nanotubes up to 0.1wt%.

• Subjects / Keywords

  • Metal matrix composites
  • Accumulative roll bonding
  • Carbon nanotubes

• Graduation date

  2011-06

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3ZH3V

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.