|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermal and Mechanical Stability of Nanocrystalline Materials
||Exploring the Thermal Evolution of Nanomaterials: From Nanometallic Multilayers to Nanostructures
||J. Sebastian Riano, Andrea M. Hodge
|On-Site Speaker (Planned)
||J. Sebastian Riano
Nanocrystalline materials have exceptional properties which result from their high density of grain boundaries. For instance, the strength of nanocrystalline materials is an order of magnitude greater than that of coarse-grain materials. These properties usually degrade at elevated temperatures where grain growth and other related phenomena reduce the grain boundary density. Nanometallic multilayers (NMMs) can be used as a model system for the study of thermal phenomena in nanomaterials.
The potential of NMMs as a route to synthesize stable nanostructures is explored by examining the microstructural evolution of Mo-Au and Ta-Hf NMMs through differential scanning calorimetry (DSC) and heat-treatments at different temperatures. Transitions occurring between room temperature and 1000 °C were identified using DSC scans. The microstructures before and after transitions were characterized by TEM and EDS techniques to measure changes in composition and grain size. Understanding the evolution of NNMs will allow tailoring nanomaterials with increased thermal stability.
||Planned: Supplemental Proceedings volume