|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||High Temperature Mechanical Properties of Materials Synthesized from Graphene and Carbon Nanotubes
||Sanjit Bhowmick, Chandra Sekhar Tiwarya, Syed Asif, Pulickel M. Ajayan
|On-Site Speaker (Planned)
Nanoengineered 3D materials manufactured from 2D graphene and 1D carbon nanotubes gained visibility in the recent past due to numerous novel applications, primarily in the two most challenges before mankind today, namely, environment and energy. This study focuses on understanding the variation in mechanical properties and deformation mechanism of such 3D materials as a function of temperature. An in-situ nanomechanical instrument, PI 87xR SEM PicoIndenter was used to conduct uniaxial compression of pillar samples that were FIB milled from 3D materials. Materials synthesized from graphene sheets showed completely elastic behavior and brittle fracture at RT. A considerable amount of plasticity was observed at higher temperature. In contrast, carbon nanotube-based bulk materials showed strain softening in loading and significant recovery during unloading both at RT and elevated temperatures.