Formation and structural anomaly of the metastable phases in an immiscible Ag-Mo system studied by ion beam mixing and molecular dynamics simulation

Article Abstract:

The nanosized Ag-Mo multilayered samples are designed and prepared for the equilibrium immiscible Ag-Mo system characterized by a large positive heat of formation to include sufficient interfacial free energy to elevate their initial energetic states to be higher than that of either the amorphous phase or solid solution. Results show that a uniform amorphous alloy can be obtained within a composition range at least from 25 to 88 atom % of Mo.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Molybdenum, Electric properties, Molecular dynamics

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Upper critical solution temperature phase behavior, composition fluctuations, and complex formation in poly (vinyl methyl ether)/D2O solutions: Small-angle neutron-scattering experiments and Wertheim lattice thermodynamic perturbation theory predictions

Article Abstract:

Small-angle neutron-scattering (SANS) measurements are described for mixtures of poly (methyl vinyl ether) (PVME) and deuterium oxide (D2O) in the homogeneous part of the phase diagram, covering the whole composition range and focusing on the low-temperature behavior. The Wertheim lattice thermodynamic perturbation theory (LTPT) has provided a theoretical basis to understand the formation of polymer solvent associations in PVME/water.

Heavy Water, Neutrons, Properties, Neutron scattering, Perturbation (Mathematics)

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Nonequilibrium solid phase formation studied by lattice dynamics calculation and ion beam mixing in an immiscible Co-Ag system

Article Abstract:

A proven realistic ab initio derived n-body potential is applied to study the nonequilibrium solid phase formation at three chemical stoichiometries of Co/Ag = 1:3, 1:1 and 3:1 for the equilibrium immiscible Co--Ag system. Some of the predicted nonequilibrium solid phases, that is hcp-type compounds at chemical stoichiometries of Co/Ag = 1:3 and 3:1 respectively are obtained in ion beam mixing experiments.

Cobalt Compounds

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