Microscopic structure and dynamics of bulk metallic glass-forming liquids with minor additions
Thermodynamics and Kinetics as well as Properties of Phases and Microstructure of Materials
Final Report Abstract
The present project studies the structure and dynamics of glass forming liquids upon a minor addition of a third element on both microscopic and macroscopic level, to understand the mechanism of the improvement on glass forming ability. Exemplarily, two alloy systems: Zr-Cu and Ti-Cu with Al and Si as third minority components, as well as the binary subsystem Zr-Ti have been investigated. In contrast to elemental metal or Zr-Ti where the melt dynamics is controlled by packing, it was found that in these glass-forming alloy melts sluggish dynamics is rather related with chemical interactions, particularly upon the addition of Al. While for Zr-Cu-Al in the studied compositional range the improved glass forming ability of the melt can be associated to the slowdown of its kinetics, in the case of Ti-Cu-Si such an enhancement is a result of both the melt dynamics and crystallization behaviour.
Publications
-
Self-diffusion in single component liquid metals: a case study of mercury. Journal of Physics: Condensed Matter, 33(37), 375101.
Szabó, Sandro; Yang, Fan; Lohstroh, Wiebke & Petry, Winfried
-
Local structures and undercooling ability of Zr–Ti melts. Journal of Non-Crystalline Solids, 613, 122348.
Zhang, Chi; Feng, Yun; Liu, Huashan; Szabó, Sandro; Holland-Moritz, Dirk; Evenson, Zach; Yang, Fan & Peng, Hailong
-
Relationship of the atomic dynamics and excess volume of a copper rich Cu76Ti24 alloy melt. High Temperatures-High Pressures, 52(2), 165-173.
Kreuzer, Lucas P.; Yang, Fan; Szabo, Sandro; Evenson, Zach; Meyer, Andreas & Petry, Winfried
-
Atomic diffusion in liquid gallium and gallium-nickel alloys probed by quasielastic neutron scattering and molecular dynamic simulations. Journal of Physics: Condensed Matter, 36(17), 175403.
Shahzad, A.; Yang, F.; Steffen, J.; Neiss, C.; Panchenko, A.; Goetz, K.; Vogel, C.; Weisser, M.; Embs, J. P.; Petry, W.; Lohstroh, W.; Görling, A.; Goychuk, I. & Unruh, T.
-
Dynamical and structural properties of undercooled Cu-Ti melts investigated by neutron and x-ray diffraction. Physical Review B, 109(17).
Kreuzer, Lucas P.; Yang, Fan; Evenson, Zachary; Holland-Moritz, Dirk; Bernasconi, Andrea; Hansen, Thomas C.; Blankenburg, Malte; Meyer, Andreas & Petry, Winfried
