Impact of Sulfur on the structure and dynamics of glass-forming metallic melts
Bulk metallic glasses (BMGs) combine a spectrum of interesting physical properties. However their commercialization is difficult as most of them consist of harmful/expensive elements. Recently, a new family of S-based BMGs was discovered. Due to its accessibility, S has the potential to commercialize this material class. Simultaneously, it increases the glass forming ability (GFA) of various BMGs. In order to understand the complex mechanisms of GFA enhancement, the structure of these melts needs to be studied. In fact, molten S has a complex coordination behavior and might increase the complexity of the melt. Such a situation is prone to vitrification due to geometrical frustration. We performed synchrotron X-ray diffraction experiments on levitated Ti-Ni-S droplets. Nevertheless, with this technique no partial structure factors of the individual elements can be extracted. Therefore, we propose neutron diffraction experiments on Ti-Ni, Ti-Ni-S, as well as on Nb-Ni-S at D20, with isotope substituted samples (natural Ni, 58Ni and 60Ni). The structural studies are supplemented by quasi-elastic neutron scattering experiments at NEAT (Helmholtz-Zentrum Berlin), scheduled in July 2019.
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WILDEN Johanna; ADAM Bastian; AUMUELLER Tobias; FREY Maximilian; Thomas C. Hansen; HOLLAND MORITZ Dirk; HU Jinliang; NEUBER Nico; RUIZ MARTIN Maria Dolores; SCHILLER Toni; SCHULZENDORFF Till; SONDERMANN Elke; SZABO Sandro and YANG Fan. (2020). Impact of Sulfur on the structure and dynamics of glass-forming metallic melts. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-1011
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