Surface Diffusion in Coadsorbed Layers with Different Mobilities of Adsorbates: (Li +Dy) on Mo(112) and (Li+Sr) on W(112)

A.T. Loburets; N.B. Senenko; M.A. Mukhtarov; Yu.S. Vedula; A.G. Naumovets

doi:10.4028/www.scientific.net/DDF.277.201

Paper Titles

3D Monte Carlo Simulation of Phase Separation Kinetics in a Binary Metallic Alloy with Vacancy Mediated Diffusion: Effect of Initial Supersaturation
p.161

Size-Induced Freezing Effect in Monte-Carlo Simulations of Phase Separation Kinetics in Nanoparticles
p.167

Diffusion during Powder Metallurgy Synthesis of Titanium Alloys
p.177

Composition Fluctuations in the Ostwald Ripening
p.187

Kinetic and Thermodynamic Precipitation Parameters of the Pb-Sn Solid Solutions
p.193

Surface Diffusion in Coadsorbed Layers with Different Mobilities of Adsorbates: (Li +Dy) on Mo(112) and (Li+Sr) on W(112)
p.201

Modelling of the Formation of Pd-Ni Alloy Nanoparticles by Interdiffusion
p.207

Generalization of Fisher Model for Periodically Non-Uniform Grain Boundary
p.213

Reactionary Interaction as the Basis of Occurrence Heterogeneity Diffusion Properties Grain Boundaries in Polycrystalline Silver
p.221

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 277Surface Diffusion in Coadsorbed Layers with...

Surface Diffusion in Coadsorbed Layers with Different Mobilities of Adsorbates: (Li +Dy) on Mo(112) and (Li+Sr) on W(112)

Abstract:

With the aim to study the regularities of surface diffusion in coadsorbed layers, we investigated diffusion of lithium on the (112) surfaces of Mo and W precovered with submonolayers of dysprosium and strontium, which have substantially lower mobilities than lithium. Experiments were carried out using scanning contact-potential microscopy, and Li diffusion parameters were extracted from diffusional evolution of coverage profiles. Dy and Sr preadsorbed in amounts of ∼10–1 of a monolayer were found to reduce the diffusion rate of Li by orders of magnitude. The strong impact of coadsorbates with low mobility on Li diffusion can be caused by important role of collective mechanisms in surface diffusion, which entails pronounced pinning effects, as well as by the possibility of formation of surface alloys and surface vitrification.