Results 211 to 220 of about 6,436 (249)

Solute segregation at ordered grain boundaries

Surface Science, 2001
Abstract A simple phenomenological model of solute segregation at partially ordered grain boundaries is proposed. It is consistent with present understanding of equilibrium segregation phenomena. The model is used to correlate complex concentration and temperature dependences of silicon segregation in ordered Fe–Si alloys.
P Lejček, O Schneeweiss
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Surface segregation in jellium binary solid solutions

Physical Review B, 1985
The electron-density-functional method is applied to a jellium model for the surface-segregated binary (single-phase) solid solution. The segregation potential, thickness of the segregated layer, and the segregating component are determined and the following rule is derived for a binary (single-phase) solid solution of substitutional type: Atoms of the
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Perceptions of Segregation, Diversity, and Solutions

Broad-based problems, particularly those of social equity that go unrecognized, are rarely addressed by political nor administrative organs. While many Americans believe systematic school segregation is a thing of the past, recent studies show the contrary: racial segregation in persists in many states, even in those thought to be Blue and liberal ...
Peter Woolley, Dan Cassino, Madelyn Ferrans   +2 more
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Solute segregation to voids during irradiation

Physical Review B, 1977
Substitutional solute segregation to a void surface during irradiation has been calculated by means of a kinetic model previously used to study segregation to the surfaces of thin foils. The results are qualitatively similar to those for the foils with respect to temperature, defect-production rate, internal sink density, and defect--solute binding ...
R. A. Johnson, Nghi Q. Lam
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Surface segregation in dilute solid solutions

Acta Metallurgica, 1976
Abstract There is an interaction energy between solute atoms and a free crystal surface causing surface segregation. Size and shape of the interaction potential is estimated and the kinetics of the segregation process are discussed.
H.P. Stüwe, I. Jager
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A Mechanism for Solute Segregation to Grain Boundaries

MRS Proceedings, 1989
ABSTRACTBased an the local equilibrium among vacancies, solute atans and vacancy-solute atom complexes, a mechanism for solute segregation to grain boundaries is suggested for a alloy system with binding energy of complex S≫kT. A set of dynamic equations for grain boundary segregation is ived, which can describe both equilibrium and nonequilibrium ...
Chu Youyi, Zhan Sanhong
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Back to the Future: A Simple Solution to Schelling Segregation [PDF]

, 2011
The maximum entropy methodology is applied to the Schelling model of urban segregation in order to obtain a reliable prediction of the stable configuration of the system without resorting to numerical simulations. We show that this approach also provides an implicit equation describing the distribution of agents over a city which allows for directly ...
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Segregation of Solute Atoms to Stacking Faults

Journal of the Physical Society of Japan, 1962
An experimental evidence was given for the segregation of solute atoms to stacking faults in alpha-brass. The stacking fault energy in an alpha-phase solid solution with face-centered cubic structure usually decreases continuously with the increasing concentration of solute atoms.
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Mass Transport and Solute Segregation

1993
Most crystals required for commercial application need to be doped with a deliberately added solute in order to acquire the needed properties. (One significant exception to this is undoped semi-insulating gallium arsenide). The device specification will require that the doping level is precisely controlled and that it be uniform throughout the crystal ...
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Segregation surface in binary solid solutions

Russian Journal of Physical Chemistry B, 2009
Analytic equations describing the concentration profile, surface energy, and adsorption for a binary solid solution with the emergence of one of the components to the surface (surface segregation) were obtained using a unique approach, a modified van der Waals approximation. The calculation results were compared with the experimental secondary ion mass
S. Sh. Rekhviashvili, A. M. Karmokov, E. V. Kishtikova   +2 more
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