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

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

2005-05-11

arxiv.org/abs/cond-mat/0505287v1

Appl. Phys. Lett. 86, 011918 (2005)

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 4 figures

Scientific paper

10.1063/1.1845590

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.

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