|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-139: Enhanced Mechanical and Electrical Properties of Nanocrystalline Cu Matrix Nanocomposite with In-situ Formed NbC Nanoparticles
||Wei Zeng, Dengshan Zhou, Deliang Zhang
|On-Site Speaker (Planned)
Nanocrystalline Cu-6.4vol.%NbC nanocomposite with grain size of about 96 nm containing in-situ formed NbC particles of about 6.1 nm was successfully fabricated through high energy mechanical milling, cold pressing, vacuum sintering and hot extrusion. The mechanical and electrical properties of the nanocomposite are outstanding, reflected by a tensile strength of 868 MPa, an elongation to failure of 5.3%, and an electrical conductivity of about 56% international annealed copper standard (IACS). The material exhibited ultrahigh thermal stability, with limited grain growth from 96 to 165 nm after annealing the sample at 1000 ˚C for 50 h, though the average size of the NbC nanoparticles increased dramatically from 6 to 29 nm. The high strength of the nanocomposite is ascribed to the concurrent effects of both grain boundary strengthening and nanoparticles strengthening, the good tensile ductility maybe due to the resistance to deformation instability through the interactions between NbC nanoparticles and dislocations.
||Planned: Supplemental Proceedings volume