|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||High Pressure, High Temperature Structural Study of Zr-based Glasses
||Wojciech Dmowski, Stanislaw Gierlotka, Yoshihiko Yokoyama, Takeshi Egami
|On-Site Speaker (Planned)
There have been observations that hydrostatic pressure affects glass temperature (Tg), induces structural relaxation, and delays crystallization of bulk metallic glasses (BMG). We investigated structure and microstructure of Zr-based bulk metallic glasses after high pressure quenching form the supercooled melt. We observed formation of variety of structures: single phase glasses, glass-crystalline composites, and nanocrystalline phases. The final structure deepened on both pressure and temperature. However, all samples were crystallized when heated above Tg+150 deg even at 8 GPa. Using high energy X-ray diffraction, pair density function analysis and TEM we identified distinct glass and glass-nanocrystalline structures. Mechanical testes were done on single phase glasses. We also performed molecular dynamics simulation of the high pressure quenching and obtained model glasses. The MD data qualitatively agrees with the experimental PDF. Work supported by the U.S. DOE, DE-AC05-00OR-22725.
||Planned: Supplemental Proceedings volume