2024 Diffusion induced grain boundary migration

Diffusion induced grain boundary migration

Author: bpzn

August undefined, 2024

WebDec 18, 2009 · Grain boundaries are widely envisaged to be mechanically static structures, but this report outlines an experimental investigation of stress-driven grain boundary migration manifested as grain growth in nanocrystalline aluminum thin films. WebJul 18, 2013 · Diffusion induced grain boundary migration (DIGM) has been studied in the Ni-Zn system by exposing polycrystalline Ni to Zn vapour with the Ni-30 wt% Zn alloy acting as a source. The time and temperature dependence of the migration distance and hence the rate of migration was studied in the temperature range 773 to 933 K.

(PDF) Grain Boundary Diffusion in Metals

WebIn this paper, the initiation/growth mechanism, product morphology, driving force, reaction kinetics, and effect of external parameters on the major discontinuous reactions, namely, discontinuous precipitation, coarsening, dissolution, and diffusion induced grain boundary migration have been discussed. WebThe paper summarizes recent experiments on diffusion at migrating grain boundaries (GBs) occurring during discontinuous reactions, like discontinuous precipitation (DP) and … erik the red battles

Numerical study of grain boundary effect on Li+ effective …

WebJun 25, 2024 · Diffusion-induced grain boundary migration is a phenomenon in which a grain boundary moves in response to the driving forces generated by diffusing … Web1 day ago · 1.Introduction. A significant body of literature has focused on nanocrystalline metals as radiation-tolerant materials due to the high density of interfaces potentially leading to enhanced annihilation of irradiated-induced defects through the absorption of interstitials at interfaces [1, 2].At low homologous temperatures, biased diffusion of interstitials to … WebOct 6, 2003 · Diffusion induced grain boundary migration (DIGM) has been studied in the Ag-Zn system by exposing polycrystalline Ag to Zn vapor with a Ag-25 wt.% Zn alloy … erik the red biography \u0026 facts britannica

Effect of solute segregation on diffusion induced grain boundary ...

WebHerein, grain boundary included atomic models, for the first time, have been adopted for accurate DFT analysis of the practical Rb+ distribution in perovskites. Assisted with the synchrotron-based grazing incidence X-ray diffraction technique, the spatial distribution of Rb+ covering both grain interiors and grain boundaries have been ... WebJun 1, 2024 · Diffusion-induced grain boundary migration (DIGM) is the phenomenon of normal grain boundary (GB) migration caused by the lateral diffusion of solutes along it. Despite its technological... find the zeroes of the cubic polynomialWebNov 1, 2024 · It was found that diffusion-induced grain boundary migration (DIGM) is responsible for the rapid Cr transportation and the formation of a continuous Cr 2 … erik the red background

"WebOur results suggest that (1) grain boundaries can affect bubble swelling in grain matrices significantly and can have a dominant effect over crystal structure, and (2) an NC-Ni-based material can yield superior resistance to irradiation-induced bubble growth compared to an NC-Fe-based material and exhibits high potential for use in extreme ... " - Diffusion induced grain boundary migration

Diffusion induced grain boundary migration

WebAtom migration induced stress in an LSI conductor is analyzed on the basis of diffusion along grain boundary (GB) and interface. The focus is put on the network of GB and … WebSep 14, 2024 · While recrystallization (or to avoid confusion, “conventional nucleation during recrystallization”) involves the formation of new strain-free grains by nucleation in the strained regions, SIBM comprises migration of grain boundaries of the preexisting strain-free grains into the deformed regions.

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WebEvidence that diffusion itself can induce boundary migration is reviewed. Experiments documenting this fact using zinc-iron alloys are discussed. The relationship of grain … WebJul 5, 2014 · Grain-boundary diffusion is of concern. It has caused two very well-known failure modes in Si devices: electromigration in Al interconnects and Al-penetration into Si through diffusion barriers. In electromigration, it is known that voids are formed at the triple point of grain boundaries and extend out along grain boundaries.

WebFeb 25, 2024 · However, a fine dispersion of cementite particles was present in the microstructure as a result of the lamellae spheroidization. These particles lead to a high dragging force for the migration of high-angle grain boundaries because of the Zener pinning of the boundaries and, thus, the recrystallization and coarsening of ferrite were … WebGrain boundaries in synthetic calcite bicrystals and slabs of Yule marble exposed to SrCO/sub 3/ at temperatures between 650 and 800/sup 0/C undergo diffusion-induced grain-boundary migration (DIGM). As the boundary migrates through the crystal, it produces a (Ca, Sr)CO/sub 3/ solid solution.

WebJun 25, 2024 · In this paper, we introduce our previously developed Cahn-Hilliard–phase-field-crystal model (CH-PFC) as a computational tool to investigate diffusion-induced grain boundary migration in crystalline materials. This multiscale phase-field model couples the composition field of a diffusing species with the crystallographic texture of a host material. WebDiffusion along static dislocations, low angle grain boundaries, and high angle grain boundaries is considered next. For most cases of interest this short-circuit diffusion process is essentially “in series” with a volume …

WebThe diffusion induced grain boundary migration (DIGM) has been studied in the Ni(Cu) system over the temperature range 723--1,023 K using light microscopy, scanning …

WebJan 11, 2024 · Grain boundary (GB) migration plays an important role in modifying the microstructures and the related properties of polycrystalline materials, and is governed by the atomistic mechanism by... erik the red birth and deathWebAbstract. In this article, we present results of systematic studies of the effects of grain boundary parameters upon diffusion-induced grain boundary migration (DIGM). It is shown that grain boundary velocity, solute penetration depth, concentration of deposited solute, and activation energy are all strongly and reproducibly dependent upon the ... erik the red bornWebJan 1, 2005 · Such processes include Coble creep, sintering, diffusion-induced grain boundary migration, discontinuous reactions (such as discontinuous precipitation, discontinuous coarsening, etc.),... erik the goodWebDiffusion induced grain boundary migration (DIGM) was studied by transmission electron microscopy and scanning transmission electron microscopy in the gold-rich layer of thin … erik the red beardWebJun 25, 2024 · Diffusion-induced grain boundary migration is a phenomenon in which a grain boundary moves in response to the driving forces generated by diffusing solute … find the zeroes of the polynomial 4u2+8uWebDiffusion-induced grain boundary migration (DIGM) can occur due to diffu-sion of solute atoms in or out of the grain boundaries, leaving in the wake an alloyed or … erik the red bookWebNov 24, 2024 · While the microstructure showed relatively high thermal stability during annealing at 500°C, significant grain boundary (GB) migration occurred in the nanolaminated surface layer during chromizing at the same temperature. GB diffusion of Cr was observed under the Harrison B-type regime in the chromized surface layer. erikthered.com