Ostwald Ripening — A Survey

Fischmeister, H. F.; Grimvall, Göran

doi:10.1007/978-1-4615-8999-0_9

Cited by 41 publications

(24 citation statements)

References 46 publications

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“…Equation 17 is confirmed by different authors (e.g. Lewis and Randall 1961;Fischmeister and Grimvall 1973;Kingery et al 1976;Parks 1984Parks , 1990. The geometric factor in Equation 17 is [1/r 1 À 1/r 2 ] for a uniaxial ellipsoid with radii r 1 and r 2 .…”

Section: Calcite Coarseningsupporting

confidence: 66%

Contact metamorphism and crystal size distribution studies in the Shivar aureole, NW Iran

Moazzen

Modjarrad

2005

Geol. J.

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The Shivar pluton, a large granodiorite-monzonite intrusion in NW Iran, was intruded into Cretaceous sedimentary rocks during the Oligo-Miocene. Its thermal aureole contains a variety of pelitic, basic and calc-silicate hornfelses. Mineral parageneses in the pelitic and calc-silicate hornfelses are studied here and mineralogical zones are determined. The maximum pressure of contact metamorphism is estimated to have been about 2.2 kbar on the basis of mineral parageneses in the pelitic rocks, indicating that the intrusion was emplaced no deeper than 8 km in the crust. Crystal size distribution (CSD) studies in the calc-silicate hornfelses indicate that the degree of overstepping was high near the igneous contact. Secondary solid phases (SSP) inhibited growth of calcite grains in the calc-silicate rocks and impure marbles. Garnet had a greater inhibitory effect as a SSP than tremolite or clinopyroxene. The time required for coarsening of calcite is calculated for two samples collected at different distances from the igneous contact. The time required for calcite coarsening is about 33 000 years for the sample 800 m from the contact and about 226 000 years for the sample 120 m from the contact.

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Section: Calcite Coarseningsupporting

confidence: 66%

Contact metamorphism and crystal size distribution studies in the Shivar aureole, NW Iran

Moazzen

Modjarrad

2005

Geol. J.

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“…Ostwald ripening is based on Ostwald's observations [4,14,34] on mercuric oxide precipitates in potassium bromide and sodium thiosulfate solutions. He was the first one to qualitatively describe the increase of solubility with decreasing particle size.…”

Section: Coarsening By Ostwald Ripeningmentioning

confidence: 99%

“…He was the first one to qualitatively describe the increase of solubility with decreasing particle size. This can be mathematically expressed through Thomson-Freundlich's equation [14], also known as Gibbs-Thomson's equation [4,57]:…”

Section: Coarsening By Ostwald Ripeningmentioning

confidence: 99%

Geometrical Monte Carlo model of liquid-phase sintering

Luque

Aldazábal

Martı́nez-Esnaola

et al. 2010

Mathematics and Computers in Simulation

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“…Since its inception in 1961, the cube root law developed on either side of the iron curtain by Lifshitz, Slyozov [13] and Wagner [29] (LSW) to quantitatively describe the phenomenon of spherical particle coarsening (Ostwald ripening), has been successfully applied to several systems [9]. Furthermore, using an adaptation defined by Boyd et al [2] a decade later,particles such as c 00 (Ni 3 Nb-D0 22 ) in Ni-base alloys [4,7,8,11,23,28,30,31].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of classical precipitation descriptions for $$\gamma ^{\prime \prime } \,(\hbox {Ni}_{3}\hbox {Nb}{-}\hbox {D0}_{22})$$ γ ″ ( Ni 3 Nb - D0 22 ) in Ni-base superalloys

et al. 2017

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The growth/coarsening kinetics of c 00 ðNi 3 NbÀD0 22 Þ precipitates have been found by numerous researchers to show an apparent correspondence with the classical (Ostwald ripening) equation outlined by Lifshitz, Slyozov and (separately) Wagner for a diffusion controlled regime. Nevertheless, a significant disparity between the actual precipitate size distribution shape and that predicted by LSW is frequently observed in the interpretation of these results, the origin of which is unclear. Analysis of the literature indicates one likely cause for this deviation from LSW for c 00 precipitates is the ''encounter'' phenomenon described by Davies et al. (Acta Metall 28(2):179-189, 1980) that is associated with secondary phases comprising a high volume fraction. Consequently, the distributions of both c 00 precipitates described in the literature (Alloy 718) and measured in this research in Alloy 625 are analysed through employing the Lifshitz-Slyozov-Encounter-Modified (LSEM) formulation (created by Davies et al.). The results of the LSEM analysis show good far better agreement than LSW with experimental distributions after the application of a necessary correction for what is termed in this research as ''directional encounter''. Moreover, the activation energy for c 00 coarsening in Alloy 625 shows conformity with literature data once the effect of heterogeneous (on dislocations) precipitate nucleation at higher temperatures is accounted for.

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Ostwald Ripening — A Survey

Cited by 41 publications

References 46 publications

Contact metamorphism and crystal size distribution studies in the Shivar aureole, NW Iran

Contact metamorphism and crystal size distribution studies in the Shivar aureole, NW Iran

Geometrical Monte Carlo model of liquid-phase sintering

Evaluation of classical precipitation descriptions for $$\gamma ^{\prime \prime } \,(\hbox {Ni}_{3}\hbox {Nb}{-}\hbox {D0}_{22})$$ γ ″ ( Ni 3 Nb - D0 22 ) in Ni-base superalloys

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