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ICAMS
Dr. Sergei Starikov

Postdoctoral Researcher

Department:

Group: Atomistic Simulation of Mechanical Behaviour

ICAMS

Contact


Ruhr-Universität Bochum
IC 02/727
Universitätsstr. 150
44801 Bochum

Tel.: +49 234 32 25395
E-Mail: sergei.starikov@rub.de

Research

(left) Atomistic simulation of a particle containing two grains: the surface emits point defects diffusing along GB. (right) Calculated bulk and GB self-diffusion in iron.
ICAMS 2020

My current research is focused on study of bulk and grain boundary (GB) self-diffusion of atoms in bcc metals. I combine different models for comprehensive investigation of diffusion processes. In particular, large scale atomistic simulation of a spherical nanoparticle containing two grains allows us to determine principal characteristics of GB self-diffusion: free surface of the simulated particle naturally regulates formation and removal of point defects that govern diffusion along GB. In our recent article, we found that atomic self-diffusion in symmetric tilt GBs in iron is mostly driven by self-interstitial atoms. In contrast, in general GBs atoms diffuse predominantly via an exchange mechanism that does not involve a particular defect but is similar to diffusion in liquid. Most observed mechanisms lead to significant enhancement of self-diffusion along GBs as compared to diffusion in the bulk.

Competences

Interatomic potential, phase transitions.

Publications
Talks and Posters
Short CV

Professional Experience

2007-2018 Researcher, JIHT, Moscow, Russia
from 2011 Visiting scientist, Argonne National Lab, USA

Education

2011. PhD, Condensed Matter Physics, Moscow Institute of Physics and Technology

2007. Dipl.-Phys., Radiophysics and Electronics, Orenburg State University

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