Accession Number:

ADA522080

Title:

Modified Embedded Atom Method Study of the Mechanical Properties of Carbon Nanotube Reinforced Nickel Composites

Descriptive Note:

Journal article (postprint)

Corporate Author:

UNIVERSITY OF NORTH TEXAS DENTON

Report Date:

2010-01-01

Pagination or Media Count:

14.0

Abstract:

We report a computational study of the mechanical behavior of nanocomposite materials that are formed by incorporating aligned carbon nanotubes CNTs into a bulk nickel matrix. Mechanical properties of these novel materials are predicted and strain-stress relationships are investigated by atomistic calculations with interactions derived from the modified embedded-atom method MEAM. The NiCNT composites are simulated using three single-walled nanotubes SWCNTs with varying diameters and a multi-walled MWCNT nanotube. Simulations predict that all NiCNT composites are mechanically stable. Within the small elastic deformation regime, the NiCNTs show a very high Youngs modulus compared to FCC nickel. In the longitudinal direction, the direction in which the CNTs are aligned, the single-crystal NiCNTs show a Youngs modulus ranging from 0.3 TPa for NiSWCNT5,0 to 0.5 TPa for NiSWNCT15,0. NiMWCNT shows the highest value of 0.6 TPa for Youngs modulus. These values are slightly lower than the corresponding pristine nanotubes.

Subject Categories:

  • Refractory Fibers
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE