Structural aspects of glass-formation in Ni-Nb melts

Journal Article · Wed May 28 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4878921· OSTI ID:22304520

Holland-Moritz, D.; Yang, F.; Gegner, J.; Meyer, A. ^[1]; Hansen, T. ^[2]; Ruiz-Martín, M. D. ^[3]

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1. Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln (Germany)
2. Institut Laue-Langevin (ILL), 38042 Grenoble (France)
3. Grup de Caracterització de Materials, Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Barcelona (Spain)

We report on investigations of the static structure factors of glass-forming Ni{sub 59.5}Nb{sub 40.5} alloy melts by combination of the containerless processing technique of electrostatic levitation with neutron diffraction. By application of the isotopic substitution method, the full set of partial structure factors was determined. The short-range order in liquid Ni{sub 59.5}Nb{sub 40.5} is characterized by a large nearest neighbor coordination number of Z{sub NN} = 14.3 and a chemical short-range order with an affinity for the formation of heterogeneous Nb-Ni nearest neighbors. The structure factors observed here in the liquid state closely resemble those reported for amorphous Nb-Ni solids. The comparison with earlier results on the short-range structure in Zr-based glass-forming melts suggests that a large local density of packing, chemical order, and structural frustration are, amongst others, common structural properties of these metallic glass-forming systems, which favor glass-formation.

• OSTI ID: 22304520
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 20 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COORDINATION NUMBER
GLASS
ISOTOPIC EXCHANGE
LEVITATION
METALLIC GLASSES
NEUTRON DIFFRACTION
NICKEL ALLOYS
NIOBIUM ALLOYS
PACKINGS
SOLIDS
STOWING
STRUCTURE FACTORS