The Influence of Chemical Short Range Order on Atomic Diffusion in Al-Ni Melts

Abstract

We use inelastic neutron scattering and molecular dynamics (MD) simulation to investigate the chemical short range order (CSRO), visible through prepeaks in the structure factors, and its relation to self diffusion in Al-Ni melts. As a function of composition at 1795K Ni self diffusion coefficients from experiment and simulation exhibit a non-linear dependence with a pronounced increase on the Al-rich side. This comes along with a change in CSRO with increasing Al content that is related to a more dense packing of the atoms in Ni-rich Al-Ni systems.

11 pages, 4 figures

References in corpus (3)

• Molecular Dynamics Simulations
• Atomic Transport in Dense, Multi-Component Metallic Liquids
• Mixing effects for the structural relaxation in binary hard-sphere liquids

Cited by in corpus (5)

• Self-diffusion and Interdiffusion in Al80Ni20 Melts: Simulation and Experiment
• Molecular Dynamics Computer Simulation of Crystal Growth and Melting in Al50Ni50
• Diffusion and Interdiffusion in Binary Metallic Melts
• Crystal Growth in Fluid Flow: Nonlinear Response Effects
• Self-consistent generalized Langevin equation theory of the dynamics of multicomponent atomic liquids