Parameters of microdiffusion in f.c.c.-Ni-Mo solid solutions

The time evolution of diffuse X-ray scattering intensities conditioned by the short-range order (SRO) in Ni-Mo solid solutions is investigated. As shown, the transition from a quenched (nonequilibrium) state to the equilibrium one is accompanied by the complex time reorganization of various SRO type...

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Bibliographic Details
Published in:arXiv.org 2014-06
Main Authors: Bokoch, S M, Kulish, M P, Tatarenko, V A, Radchenko, T M
Format: Article
Language:English
Subjects:
Computer simulation
Conditioning
Density of states
Diffusion
Electron density
Mathematical models
Migration
Molybdenum
Monte Carlo simulation
Nickel
Parameters
Short range order
Solid solutions
Vectors (mathematics)
X-ray scattering
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Summary:The time evolution of diffuse X-ray scattering intensities conditioned by the short-range order (SRO) in Ni-Mo solid solutions is investigated. As shown, the transition from a quenched (nonequilibrium) state to the equilibrium one is accompanied by the complex time reorganization of various SRO types. Computer simulations of local atomic configurations in alloy with use of the Monte Carlo method, inhomogeneous-SRO model, and calculation of electron density of states (DOS) at the Fermi level give the opportunity of obtaining quantitative characteristics of atomic reconfigurations. The relaxation times of diffuse X-ray scattering intensities and Fourier components of atom jumps for different wave vectors k in reciprocal space are determined. Based on the microdiffusion model for f.c.c. solid solution, the micro- and macroscopic parameters of the atom migration of both components in Ni-Mo solid solutions are investigated.
ISSN:2331-8422