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Journal ArticleDOI

Embedded-atom-method functions for the fcc metals Cu, Ag, Au, Ni, Pd, Pt, and their alloys.

Stephen M. Foiles, +2 more
- 15 Jun 1986 - 
- Vol. 33, Iss: 12, pp 7983-7991
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TLDR
A consistent set of embedding functions and pair interactions for use with the embedded-atom method was determined empirically by fitting to the sublimation energy, equilibrium lattice constant, elastic constants, and vacancy-formation energies of the pure metals and the heats of solution of the binary alloys as discussed by the authors.
Abstract
A consistent set of embedding functions and pair interactions for use with the embedded-atom method [M.S. Daw and M. I. Baskes, Phys. Rev. B 29, 6443 (1984)] have been determined empirically to describe the fcc metals Cu, Ag, Au, Ni, Pd, and Pt as well as alloys containing these metals. The functions are determined empirically by fitting to the sublimation energy, equilibrium lattice constant, elastic constants, and vacancy-formation energies of the pure metals and the heats of solution of the binary alloys. The validity of the functions is tested by computing a wide range of properties: the formation volume and migration energy of vacancies, the formation energy, formation volume, and migration energy of divacancies and self-interstitials, the surface energy and geometries of the low-index surfaces of the pure metals, and the segregation energy of substitutional impurities to (100) surfaces.

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Citations
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A nanoscale mechanism of hydrogen embrittlement in metals

TL;DR: In this article, a new model is proposed wherein hydrogen accumulation around a micro-crack tip prevents crack-tip dislocation emission or absorption, and thus suppresses cracktip blunting and ductile fracture while promoting cleavage fracture.
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Continuum and atomistic models of strongly coupled diffusion, stress, and solute concentration

TL;DR: In this paper, a continuum model is developed and validated based on atomistic simulations of hydrogen diffusion in nickel, and the effect of the solute concentration on Young's modulus of the host material is discussed through parametric studies.
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Reactivity of bimetallic systems studied from first principles

TL;DR: The reactivity of bimetallic substrates is governed by an interplay of electronic and geometric effects which are hard to disentangle experimentally as discussed by the authors, and it is shown that electronic structure calculations allow to identify the microscopic factors underlying the reactivity.
References
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Journal ArticleDOI

Embedded-atom method: Derivation and application to impurities, surfaces, and other defects in metals

TL;DR: In this paper, the authors derived an expression for the total energy of a metal using the embedding energy from which they obtained several ground-state properties, such as the lattice constant, elastic constants, sublimation energy, and vacancy-formation energy.
Journal ArticleDOI

Semiempirical, Quantum Mechanical Calculation of Hydrogen Embrittlement in Metals

TL;DR: In this article, a semi-empirical model of metals and impurities (embedded atom method) was proposed to make possible a static treatment of the brittle fracture of a transition metal in the presence of hydrogen.
Journal ArticleDOI

Surface free energies of solid metals: Estimation from liquid surface tension measurements

TL;DR: In this paper, a semi-theoretical approach was proposed to estimate the surface energy of solids in the absence of direct experimental measurement. But this method was not suitable for the case of high-index surfaces.
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Universal features of the equation of state of metals

TL;DR: The zero-temperature equation of state of metals, in the absence of phase transitions, was shown to be accurately predicted from zero-pressure data in this article, and a simple universal relation was found.
Journal ArticleDOI

Calculation of the surface segregation of Ni-Cu alloys with the use of the embedded-atom method

TL;DR: The surface composition of Ni-Cu alloys has been calculated as a function of atomic layer, crystal face, and bulk composition at a temperature of 800 K and the results show that the composition varies nonmonotonically near the surface with the surface layer strongly enriched in Cu while the near-surface layers are enriched in Ni.
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