Fultz, B. (1987) Suppressed kinetics of short range ordering at low temperatures. Journal of Chemical Physics, 87 (3). pp. 1604-1609. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:FULjcp87
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The kinetics of short range ordering in a binary alloy were studied by Monte Carlo simulation. Unlike the kinetics of ordering by the direct interchange of atoms, at low temperatures there is a marked suppression of the kinetics of ordering when ordering occurs by the vacancy mechanism. Large activation energies are associated with this suppression of kinetics. These activation energies suggest that certain heterogeneities in the atomic arrangements on the lattice behave as traps which the vacancy cannot easily escape at low temperatures. Such traps were observed during simulations of the ordering process.
|Additional Information:||© 1987 American Institute of Physics. Received 23 February 1987; accepted 24 April 1987. Assistance with computer simulations by K. Chan, and discussions with A. Mutz, T. Lindsey, and E. Cotts are acknowledged.This work was supported by the U.S. Department of Energy under Contract No. DE-FG03-86ER45270.|
|Subject Keywords:||ALLOYS, MONTE CARLO METHOD, COMPUTERIZED SIMULATION, VACANCIES, ACTIVATION ENERGY, KINETICS, ORDER PARAMETERS, DIFFUSION|
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|Deposited On:||11 Aug 2008 15:41|
|Last Modified:||08 Jan 2017 03:19|
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