Zobrazeno 1 - 10
of 731
pro vyhledávání: '"A R Allnatt"'
Autor:
Richard Catlow
Publikováno v:
Advanced Materials. 7:327-328
Publikováno v:
Philosophical Magazine. 96:2969-2985
In this paper, a new, lighter, version of the highly accurate Moleko, Allnatt and Allnatt formalism for describing both tracer (self) and collective diffusion kinetics in multicomponent random alloys is presented. Verification of the resulting expres
Publikováno v:
Philosophical Magazine. 94:2487-2504
In this paper, an extended version of the matrix method is derived in order to address diffusion kinetics for the full anisotropic three-dimensional h.c.p. structure. It is shown that the diffusion...
Publikováno v:
Philosophical Magazine. 87:4169-4180
In strongly ionic insulating materials, the Nernst–Planck Equation relates the interdiffusion coefficient of the cations (having the same charge) with the corresponding tracer diffusivities and the thermodynamic factor. In this paper, we explore th
Publikováno v:
Philosophical Magazine. 86:5837-5846
A simple and often used model of atom transport by the vacancy mechanism on two physically distinct interpenetrating sublattices assumes that each atom–vacancy exchange frequency depends only on the species of the atom and the sublattice from which
Publikováno v:
Philosophical Magazine. 85:2787-2798
In this paper, we address a four-frequency diffusion model that allows diffusion of paired and unpaired atoms (or small molecular species) in an otherwise empty lattice. The model is useful for describing tracer and collective diffusion of interstiti
Publikováno v:
Journal of Physics: Condensed Matter. 14:6897-6907
In this study, collective and tracer diffusion kinetics is addressed for the ternary random alloy. A formal solution from the self-consistent theory of Moleko et al (Moleko L K, Allnatt A R and Allnatt E L 1989 Phil. Mag. A 59 141) is derived for col
Autor:
A R Allnatt
Publikováno v:
Journal of Physics A: Mathematical and General. 34:7441-7458
Statistical mechanical expressions are derived for atom-vacancy exchange frequencies in a crystalline insulator with a gradient of temperature and for the heat flux associated with such exchanges in an isothermal system. The associated Onsager recipr
Publikováno v:
Journal of Physics: Condensed Matter. 10:5295-5308
Approximate expressions are derived for the phenomenological coefficients for vacancy-mechanism matter transport in a nearest-neighbour interaction lattice gas model of a concentrated binary alloy using the Kikuchi-Sato jump frequency model. These ex
Publikováno v:
Canadian Journal of Chemistry. 76:1548-1553
The time correlation functions associated with the Onsager phenomenological coefficients for isothermal matter transport have been calculated by Monte Carlo simulation for a binary system (A,B) at the equiatomic composition according to the Kikuchi-S