|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties
||Gradient Nanostructured Silicon through High Power Pulsed Laser-driven Shock Compression
||Shiteng Zhao, Eric Hahn, Bimal Kad, Bruce Remington, Christopher Wehrenberg, Karren More, Eduardo Bringa, Marc Meyers
|On-Site Speaker (Planned)
High-power-nanosecond-pulsed-laser, once deposited onto materials, will ablate their surface into plasma, driving a strong shock wave into the bulk material. A transient extreme condition, characteristic of pressures in excess of tens of GPa and temperatures in excess of thousands of K, can be established and decay rapidly thereafter. Here we report, using this technique, on achieving nanostructured silicon materials with gradient grain size and heterogeneous microstructure. The talk will be focused on the mechanisms of rapid shock-induced bulk and directional amorphization and subsequent nano-crystallization. Mechanical and optical behavior of the obtained materials will also be discussed.