|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Effect of Non-wetting Nanoparticles on Precipitation Evolution
||Shipeng Shu, Xuan Zhang, Pascal Bellon, Robert S. Averback
|On-Site Speaker (Planned)
The use of nanoparticles in the processing of complex materials systems has become a powerful tool in developing new materials with unique microstructures and enhanced properties. We show here using transmission electron microscopy that a high density 1-3 nm W nanoparticles can be introduced into dilute Cu-Ag-W alloys by selective precipitation during room-temperature MeV Kr irradiation and that these nanoparticles have dramatic effects on the subsequent microstructural evolution of the alloy during annealing. Specifically, the W nanoparticles strongly suppress the coarsening of Ag precipitates below 500 °C, and around this temperature they lead to non-equilibrium, grain-boundary, wetting layer of Ag. Results of kinetic Monte Carlo simulations will be presented to explain how a wetting layer can develop. The findings offer opportunities for processing a new class of metallic nanostructures.
||Planned: A print-only volume