Competing jump cycles for vacancy diffusion in binary alloys

2008/07/31 by Zerihun Getahun, Getahun, Zerihun, Mesfin Asfaw +3
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Statistical Mechanics (cond-mat.stat-mech) #cond-mat.mtrl-sci #cond-mat.stat-mech

paper · pdf · doi:10.48550/arxiv.0807.5034

6 figures, 12 pages

arxiv created 2008/09/27 · arxiv updated 2009/12/01

Abstract

The mean-first-passage-times (MFPTs) for a vacancy that diffuses (via one- and six-jump cycles) in a two dimensional ordered binary alloy are evaluated using the properties of random walks on networks. We investigate the effect of temperature and relative barrier height on the ratio between the MFPTs of the two cycles. We find that the six-jump cycle takes shorter time than the one-jump cycle for the range of parameters considered.

Related

• Vacancy-Mediated Disordering Process in Binary Alloys at Finite Temperatures: Monte Carlo Simulations
• Interplay of order-disorder phenomena and diffusion in rigid binary alloys: Monte Carlo simulations of the two-dimensional ABV model
• Vacancy diffusion in multi-principal element alloys: the role of\n chemical disorder in the ordered lattice
• Vacancy-Assisted Diffusion in a Honeycomb Lattice and in a Diamond Lattice
• Experimental and theoretical study of tracer diffusion in a series of (CoCrFeMn)_100-xNi_x alloys