Short-range order in binary glass forming Zr-based melts
The short-range order in metallic liquids plays a fundamental role in governing the physical properties of the melt. Phenomena such as diffusion, viscosity, solidification and glass-formation are all linked to the interplay between melt structure and dynamics. Although pronounced short-range order is found in many bulk metallic glass-forming systems, the exact correlation between short-range order and glass-forming ability is still not well understood. Thus, we intend to study of the short-range order in glass-forming ZrNi, ZrCu and ZrFe melts. Using isotope substitution and neutron diffraction we intend to measure the partial static structure factors of electrostatically levitated Zr50Ni50 droplets on D20, as well as the temperature dependence of the static structure factors of the Cu65Zr35 and Zr2Fe liquids. These experiments are of fundamental importance in exploring the effect of chemical short-range order on atomic transport phenomena in Zr-bearing liquids. The results of these studies will be analyzed within the framework of mode-coupling theory, in order to establish a more detailed understanding of the structural origin of glass-forming ability.
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EVENSON Zach; Thomas C. Hansen; HOLLAND MORITZ Dirk; KOBOLD Raphael; MEYER Andreas; NOWAK Benedikt; YANG Fan and YUAN Chenchen. (2014). Short-range order in binary glass forming Zr-based melts. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-03-433
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