Structural investigation of binary glass-forming metallic melts using electrostatic levitation and isotopic substitution
Metallic glasses are of great scientific and technological interest. They are formed when a deeply undercooled alloy melt freezes in an amorphous structure at the glass transition temperature instead of crystallizing. In order to understand the glass formation process on a microscopic scale, knowledge of the short-range structure in the liquid and of the atomic dynamics is of fundamental importance especially also in the metastable regime of the undercooled melt. In preceding studies we have systematically investigated the short-range order in binary glass-forming alloys consisting of Zr and late transition metals like Ni, Cu, Co and Pd. We now propose such investigations on binary melts consisting of Ni and the early transition metals Hf and La as well as of the metalloid B. We are planning to determine partial structure factors at D20 by using an isotopic substitution technique (samples prepared with natural Ni, 58Ni and 60Ni). These structural investigations are complemented by studies on the atomic dynamics by quasi-elastic neutron scattering experiments at FRM-II and by calculations within mode coupling theory aiming to find a relation between structure and atomic dynamics.
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NOWAK Benedikt; EVENSON Zach; Thomas C. Hansen; HOLLAND MORITZ Dirk; REINERTH Caspar; YANG Fan and ZIMMERMANN Sarah. (2016). Structural investigation of binary glass-forming metallic melts using electrostatic levitation and isotopic substitution. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-03-439
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