Physical Properties of Materials at Extreme Conditions

David Wang Auditorium, 3rd floor Dalia Maydan Bldg
Dr. Eran Greenberg, Invited Speaker

Dr. Eran Greenberg, Invited Speaker

GSECARS, University of Chicago
9700 South Cass Ave, Argonne, IL, USA

The study of the physical properties of materials at extreme conditions (i.e. high-pressure (HP), high-temperature (HT) conditions) has become more widespread in recent years. By reducing the interatomic distances, pressure has a large effect on the structural and electronic/magnetic properties of materials, resulting in unique new properties and allowing the synthesis of exotic materials not achievable at ambient conditions. Recent advances in the HP-HT theoretical and experimental capabilities have led to some groundbreaking studies allowing to control physical properties of materials such as pressure-induced superconductivity at 203 K in the sulfur hydride system, synthesis of super-hard materials with various properties, synthesis of high energy density materials, and others. Combining these techniques with suitably microstructured precursor materials has allowed nanostructuring for enhancing not only the hardness, but also fracture toughness, thermal stability and wear resistance of hard and superhard materials. HP-HT studies are also important in simulating, both theoretically and experimentally, the conditions in Earth’s (and other planets’) interiors, and are therefore useful in the geosciences.
I will discuss a few recent achievements in the different realms of HP-HT studies, and provide examples from my own research in the synthesis of new materials and structural properties of materials at high-pressure conditions, using in-situ x-ray diffraction combined with laser-heated diamond anvil cell experiments.

Prof. Michael S. Silverstein