|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Advanced Functional Thin Films and Nanostructured Materials
||Effect of Geometrical Defects on Thermal and Mechanical Properties of Metal-coated Multi-walled Carbon Nanotubes
||Iman Salehinia, Ravindra Sunil Dhumal, Dinesh Bommidi
|On-Site Speaker (Planned)
It has been theoretically and experimentally established that the carbon nanotubes (CNTs) have very high thermal conductivities (2000–6000 W/mK). However, such values are rarely achievable for vertically aligned CNT bundles when used as a thermal interface material. Structural defects such as vacancies, impurities, and Stone-Wales defects play a significant role for such a poor performance. Application of metal coating on CNT surface is proposed as a way to alleviate drop in the thermal conductivity. It also improves the mechanical behavior of the CNTs. This work reports the application of molecular dynamics simulations for studying the thermal and mechanical properties of tri-walled CNTs in the presence of defects with and without the metal coating. Atomistic simulations have shown a drastic effect of vacancies (50% drop in thermal conductivity for 1% concentration). Metal coating on the surface of CNTs increases their buckling load and changes their deformation mechanisms under mechanical loading.
||Planned: Supplemental Proceedings volume