Defect clusters form readily in collision cascades in metals, and some of the self-interstitial atom clusters form as crowdion clusters that diffuse by one-dimensional migration along a close-packed direciton. Defect interactions and thermal fluctuations can cause the direction of one-dimensional migration to change, resulting in a mixed one-dimensional/three-dimensional migration. Kinetic Monte Carlo computer simulations applied to model systems are used to investigate the effects of one-dimensional, three-dimensional and mixed one-dimensional/three-dimensional migration on defect reaction kinetics. The functional relationships between the sink strength, the size of sinks and the average distance between direction changes during mixed one-dimensional/three dimensioinal migration are explored.
Revised: January 12, 2012 |
Published: January 1, 1999
Citation
Heinisch H.L., B.N. Singh, and S.I. Golubov. 1999.A Kinetic Monte Carlo Study of Mixed 1D/3D Defect Migration.Journal of Computer-Aided Materials Design 6, no. 2-3:277-282.PNNL-SA-32436.