Diffusion Growth and Morphological Stability of Two-Dimensional Grain Boundary Precipitates

Author(s) A.V. Koropov
Affiliations Institute of Applied Physics of the National Academy of Sciences of Ukraine, 58, Petropavlivska Str., 40000 Sumy, Ukraine
Е-mail ipfmail@ipfcentr.sumy.ua
Issue Volume 2, Year 2010, Number 4
Dates Received 24 December 2010, in final form 13 January 2011
Citation A.V. Koropov, J. Nano- Electron. Phys. 2 No4, 117 (2010)
PACS Number(s) 61.72. – y, 64.70.Kb, 66.30.Jt, 68.35. – p, 81.10.Jt, 81.30.Mh
Key words Supersaturated solid solutions, Aging metal alloys, Reactor materials, Radiation resistance, Macroscopic inclusions, Precipitates, Grain boundaries, Diffusion growth, Morphological stability.
Diffusion growth of two-dimensional precipitates at the grain boundary of a finite thickness was considered with due regard to the diffusion fluxes of impurity atoms from the grain volume to the grain boundary. Stability of the growing precipitates of a relatively small radius was analyzed with respect to the small random perturbations of its size and subject to the surface kinetics of impurity atoms at the grain boundary/precipitate profile. Threshold radii of the precipitates, above which the amplitude of the shape defect and the amplitude of the relative shape deformation of the precipitates rise, were found.