SHORT-RANGE ORDER AND THERMODYNAMIC BEHAVIOUR OF Pd-Si MELTS

Short-range Order in Undercooled Melts and Its Impact on the Solidification Behaviour

As suggested by Frank [1] an icosahedral short-range order should be energetically favoured in undercooled metallic melts. Such a short-range order is predicted to influence the energy of the interface between the liquid and a solid nucleus, depending on the structure of the solid phase [2]. This in turn decisively impacts the nucleation behaviour of solid phases from the undercooled melt, and ...

a-Si : SHORT RANGE ORDER BY NEUTRON SCATTERING

We report in this paper a neutron scattering study of a-Si:H, undertaken in order to point out the part played by hydrogen in the structural properties. The use of the isotopic substitution method provide us with the three partial structure factors from which have been deduced the three corresponding pair partial correlation functions. Si-H and Si-H2 units have been directly put into light. The...

Calculation of short range order in Ni–Rh, Ni–Pd and Cu–Rh alloys

Transition metal model pseudopotential (TMMP) technique has been applied to study the short range order (SRO) in nickel alloys Ni100–x–Rhx and Ni100–x–Pdx and a copper alloy Cu100–x–Rhx (x = 2, 5, 8, 11 at. %). All these transition metal alloys form fcc solid solutions for the chosen compositions. The static electrical permittivity ε(q) was taken from the Hubbard–Sham model and/or Geldart–Vosko...

Thermodynamic Chaos and the Structure of Short-range Spin Glasses

Short-range order in undercooled and stable melts forming quasicrystals and approximants and its influence on nucleation

An icosahedral short-range order has been predicted to prevail in undercooled metallic melts. For melts of pure metals this hypothesis was recently experimentally confirmed by diffraction experiments. This work presents results of neutron scattering experiments on the short-range order of stable and undercooled liquids of alloys forming quasicrystals and polytetrahedral crystals. The studies in...