Radiation damage near grain boundaries

Large-scale molecular dynamics of cascade production of the primary damage state are performed in nanocrystalline nickel with an average grain diameter of 12 nm and primary knock-on atom kinetic energies ranging from 5 to 30 keV. The role of the grain boundary during the cascade production of irradi...

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Bibliographic Details
Published in:Philosophical magazine (2003. Print) 2003-11, Vol.83 (31-34), p.3599-3607
Main Authors: Samaras, M., Derlet, P. M., Van Swygenhoven†, H., Victoria, M.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Defects and impurities in crystals
microstructure
Exact sciences and technology
Metals. Metallurgy
Physical radiation effects, radiation damage
Physics
Point defects (vacancies, interstitials, color centers, etc.) and defect clusters
Structure of solids and liquids
crystallography
Theory and models of radiation effects
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Summary:Large-scale molecular dynamics of cascade production of the primary damage state are performed in nanocrystalline nickel with an average grain diameter of 12 nm and primary knock-on atom kinetic energies ranging from 5 to 30 keV. The role of the grain boundary during the cascade production of irradiated NC Ni is discussed in terms of grain-boundary structure. It is shown that regions of misfit in the grain boundaries can absorb self-interstitials and that stacking-fault tetrahedra are formed in the neighbourhood of the grain boundary.
ISSN:1478-6435
1478-6443
DOI:10.1080/14786430310001600222