The effect of solute atoms on the energy and structure of grain boundaries

Sautter, H.; Gleiter, H.; Baró, G.B.

doi:10.1016/0001-6160(77)90237-1

Cited by 119 publications

(13 citation statements)

References 14 publications

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“…Fitting of the experimental data of CdSe and InAs syntheses after first reactants injection (from Peng et al). [5] The dotted lines show the fits of the experimental data to Equation (27), while the continuous line represents the fit obtained using Equation (28). The particle size was obtained by photoluminescence measurements.…”

Section: à7mentioning

confidence: 99%

“…[25,26] This mechanism has already been experimentally observed in micrometer-sized metallic systems for several years. [27][28][29][30] Recently, it was modeled by Moldovan et al [31][32][33][34] and investigated by molecular dynamics studies. [35][36][37][38] In all of the above-mentioned theoretical works, the authors assumed that the nanoparticles were in contact with each other.…”

Section: Introductionmentioning

confidence: 99%

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A Kinetic Model to Describe Nanocrystal Growth by the Oriented Attachment Mechanism

et al. 2005

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The classical model of particle coagulation on colloids is revisited to evaluate its applicability on the oriented attachment of nanoparticles. The proposed model describes well the growth behavior of dispersed nanoparticles during the initial stages of nanoparticle synthesis and during growth induced by hydrothermal treatments. Moreover, a general model, which combines coarsening (i.e., Ostwald ripening) and oriented attachment effects, is proposed as an alternative to explain deviations between experimental results and existing theoretical models.

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Section: à7mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Kinetic Model to Describe Nanocrystal Growth by the Oriented Attachment Mechanism

et al. 2005

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“…) show an increase in boundary energy, from zero at zero misorientation, together with energy minima associated with special boundary orientations, such as twins and coincident site lattice (CSL) orientations. Rotating ball experiments (Herrmann et al, 1976. ;Sauter et al, 1977. ;Erb & Gleiter, 1979. ) have demonstrated that reduction in surface energy can act as a driving force to change misorientations.…”

Section: Surface Energy-driven Rotation Accommodated By Grain Boundarmentioning

confidence: 99%

Development of garnet porphyroblasts by multiple nucleation, coalescence and boundary misorientation-driven rotations

Spiess¹,

Peruzzo²,

Prior³

et al. 2001

J Metamorph Geol

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Two types of garnet porphyroblast occur in the Schneeberg Complex of the Italian Alps. Type 1 porphyroblasts form ellipsoidal pods with a centre consisting of unstrained quartz, decussate mica and small garnet grains, and a margin containing large garnet grains. Orientation contrast imaging using the scanning electron microscope shows that the larger marginal garnet grains comprise a number of orientation subdomains. Individual garnet grains without subdomains are small (<50 mm), faceted and idioblastic, and have simple zoning profiles with Ca-rich cores and Ca-poor rims. Subdomains of larger garnet grains are similar in size to the individual, small garnet grains. Type 2 porphyroblasts comprise only ellipsoidal garnet, with small subdomains in the centre and larger subdomains at the margin. Each subdomain has its own Ca high, Ca dropping towards subdomain boundaries. Garnet grains, with or without subdomains, all have the same Ca-poor composition at rims in contact with other minerals. The compositional zonation patterns are best explained by simultaneous, multiple nucleation, followed by growth and amalgamation of individual garnet grains. The range of individual garnet and garnet subdomain sizes can be explained by a faster growth rate at the porphyroblast margin than in the centre. The difference between Type 1 and Type 2 porphyroblasts is probably related to the growth rate differential across the porphyroblast. Electron backscatter diffraction shows that small, individual garnet grains are randomly oriented. Large marginal garnet grains and subdomain-bearing garnet grains have a strong preferred orientation, clustering around a single garnet orientation. Misorientations across subdomain boundaries are small and misorientation axes are randomly oriented with respect to crystallographic orientations. The only explanation that fits the observational data is that individual garnet grains rotated towards coincident orientations once they came into contact with each other. This process was driven by the reduction of subdomain boundary energy associated with misorientation loss. Rotation of garnet grains was accommodated by diffusion in the subdomain boundary and diffusional creep and rigid body rotation of other minerals (quartz and mica) around the garnet. An analytical model, in which the kinetics of garnet rotation are controlled by the rheology of surrounding quartz, suggests that, at the conditions of metamorphism, the rotation required to give a strong preferred orientation can occur on a similar timescale to that of porphyroblast growth.

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“…Special boundaries in Ni, as measured by the density of coincident sites Z', have shown weak tendency for sulphur segregation [6]. Furthermore, in other experiments, a relation was found between segregation and grain boundary energy [7,8] with least impurity content at low-energy boundaries. However, an evidence of segregation of Re in a low-energy grain boundary in W exists [2].…”

Section: Introductionmentioning

confidence: 81%

Theoretical aspects of solute segregation to high-angle grain boundaries

Vasseur¹,

Deymier²,

Djafari‐Rouhani³

1993

Interface Sci

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Abstract.A high-angle grain boundary is modeled as a planar defect characterized by its thickness and atomic density. We successively examine the elastic and electronic contributions to the solute/grain boundary binding energy. We deduce the effect of the grain boundary physical parameters on its propensity for segregation. The thickness of high-angle grain boundaries is not a fundamental parameter for segregation. The atomic density in the grain boundary controls the electronic binding energy. The rate of change of elastic constants with the density is the important factor in the elastic contribution to segregation. We conclude that segregation to boundaries with small excess volumes is not precluded.

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The effect of solute atoms on the energy and structure of grain boundaries

Cited by 119 publications

References 14 publications

A Kinetic Model to Describe Nanocrystal Growth by the Oriented Attachment Mechanism

A Kinetic Model to Describe Nanocrystal Growth by the Oriented Attachment Mechanism

Development of garnet porphyroblasts by multiple nucleation, coalescence and boundary misorientation-driven rotations

Theoretical aspects of solute segregation to high-angle grain boundaries

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