|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||Mechanical Response of Highly Dense Vertically Aligned Carbon Nanotube (VACNT) Brushes Reinforced by Intertube Bridging
||Cayla Harvey, Cordero Nuanez, William M. Mook, Johann Michler, Yury Gogotsi, Siddhartha Pathak
|On-Site Speaker (Planned)
We report on the mechanical behavior of dense, small-diameter (1-3 nm), non-catalytic multiwall (2-4 walls), vertically aligned carbon nanotubes (VACNTs), fabricated using the carbide-derived-carbon (CDC) method and measured using spherical nanoindentation and SEM in-situ micro-pillar compression testing. Under focused ion beam (FIB) irradiation, stable links are hypothesized to be introduced between neighboring CNTs in the dense VACNT brush. Subsequent micro-compression testing of VACNT micro-pillars of varying diameters were conducted to study the mechanical and viscoelastic response of the VACNT bundle as a function of the amount/degree of intertube bridging. Our results show a significantly higher buckling strength for smaller diameter pillars, suggesting reinforcement from the outer rim consisting of crosslinked CNTs. The viscoelastic response of the VACNTs was also studied as a function of the volume of the crosslinked region.
||Planned: Supplemental Proceedings volume