On the influence of the stacking sequence in the nucleation of Cu3Si: Experiment and the testing of nucleation models

Ibrahim, Mohammed; Balogh, Zoltán; Stender, Patrick; Schlesiger, Ralf; Greiwe, Gerd Hendrik; Schmitz, Guido; Parditka, Bence; Langer, G.A.; Csík, A.; Erdélyi, Zoltán

doi:10.1016/j.actamat.2014.05.006

Cited by 19 publications

(3 citation statements)

References 38 publications

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“…[69][70][71] The surface energy of crystalline Al (1.16 J/m 2 for ð1 1 1Þ 72 ) is smaller than the surface energy of crystalline Zr (2.0 J/m 2 for ð0 0 0 1Þ 72 ). If such a difference in surface energy does hold for the amorphous phases as well, then there is a driving force for Al surface segregation.…”

Section: B Concentration-depth Profiles Before Diffusion Annealingmentioning

confidence: 99%

Interdiffusion in amorphous AlxZr1-x alloys

Noah

Wang

Mittemeijer

2017

Journal of Applied Physics

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Interdiffusion in amorphous AlxZr1−x compositionally modulated multilayers was investigated by Auger electron spectroscopy sputter-depth profiling. Microstructural characterisation was performed by X-ray diffraction and cross-sectional transmission electron microscopy. The temperature-dependent chemical diffusion coefficient could be deduced at a series of temperatures in the range of 356 °C to 415 °C and was found to be weakly dependent on composition. The activation enthalpy for the chemical diffusion coefficients is slightly smaller at the composition of the Al-rich am-Al0.62Zr0.38 sublayer (1.6 eV) than at the composition of the Zr-rich am-Al0.27Zr0.73 sublayer (1.8 eV), which is not related to the concentration dependence of the excess free volume but to the smaller atomic size and mass of Al as compared to Zr. The smaller activation enthalpy for interdiffusion in partially crystallised specimens than in entirely amorphous AlxZr1−x multilayers is ascribed to the relatively large excess free volume in the grain boundaries of the nanocrystalline sublayers, as compared to the amorphous phase, at large Al concentrations. On the basis of an evaluation of the role of diffusion-induced stress in amorphous systems, it is shown that stresses induced by interdiffusion relax relatively fast by viscous flow and do not affect the determined diffusion coefficients.

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Section: B Concentration-depth Profiles Before Diffusion Annealingmentioning

confidence: 99%

Interdiffusion in amorphous AlxZr1-x alloys

Noah

Wang

Mittemeijer

2017

Journal of Applied Physics

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“…On the contrary, polymorphic nucleation mode, introduced in [17] and modified to shape optimization in [18,21], describes the experimental results well. [43] The nucleation of the Cu3Si phase was studied by 3D atom-probe tomography in the sandwich Cu/Si/Cu "at the top of the tip" samples. The interface formed by deposition of Cu on Si is substantially broader than the interface formed by deposition of Si on Cu (5.3nm> 2.4 nm).…”

Section: Nucleation Of the First Phase In Co-al Reactionmentioning

confidence: 99%

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2019

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Результати моделювання кінетики кластерів точкових дефектів методом кластерної динаміки використовуються для оцінки еволюції пор у залізі під нейтронним опроміненням. В рамках моделі міжзеренного руйнування оцінено вплив зміни теператури на механічну стабільность заліза, яке опромінено в науково-дослідному реакторі БР-2. Ключові слова: нейтронне опромінення, еволюція пор, кластерна динаміка, зміна температури, -залізо. 1. Вступ Зміна механічних властивостей корпусу реактора атомних станцій відбувається внаслідок низки фізичних процесів на нано-, мікро-, мезо-та макрорівнях як у часі, так і просторі. Метод молекулярної динаміки, метод Монте-Карло та квантовомеханічний метод (ab-initio метод) застосуваються для дослідження каскадної стадії взаємодії опромінення (електронів, нейтронів та іонів) з реакторними матеріалами, яка триває від 10-15 до 10-12 секунд в області розміром до 10 нм. Метод кластерної динаміки дозволяє вивчати довготривалу кінетику кластерів точкових дефектів (вакансій та міжвузлей), а також кластерів та преципітатів, до складу якіх входять точкові дефекти та легуючі елементи реакторних сплавів. За такими результатами розрахунків кластерної динаміки як концентрація, середній розмір та чисельна щільність кластерів та преципітатів можливо розрахувати зміну межі текучості, зумовлену опроміненням. Але дотепер Серія «Фізико-математичні науки», 2019 7 4. Kondria M. Cluster dynamics simulation of the flux effect for neutron irradiated pure iron / M. Kondria, A. Gokhman // Radiation Effects and Defects in Solids: Incorporating

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“…[4] concluded that due to the small bulk diffusion lengths ( 1 nm), the role of grain boundaries could be neglected and point defect annealing processes at around the initial interfaces can explain the observed time dependence of the effective diffusion coefficient. Fe isotope bilayer using depth profiling by a Secondary Neutral Mass Spectrometer (SNMS), which provides a very good depth resolution and even about 1-2 nm [19][20][21][22] can be reached. Additionally, we interpret our results by means of a model calculation in a bilayer structure having GBs perpendicular to the interface.…”

mentioning

confidence: 99%

Nanoscale diffusion in Pt/56Fe/57Fe thin-film system

et al. 2015

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Low-temperature diffusion of Fe in Pt/ 56 Fe/ 57 Fe thin films (grown on MgO (100) substrate) was investigated between 703 K and 813 K using secondary neutral mass spectrometry. The activation energy of the effective interdiffusion coefficients, evaluated by the -centre-gradient‖ method, is 1.53±0.25 eV reflecting a strong contribution from grain boundaries. This is also supported by the observed deep penetrations of Pt into the 56 Fe layer, from which the grain boundary diffusion coefficients for Pt in Fe were also estimated and 1.45±0.25 eV activation energy was obtained. A simple model, including the effect of grain boundaries to the overall intermixing at the original sharp interfaces in nanocrystalline films, is developed. This predicts that at short annealing times the grain boundary diffusion dominates, and bulk diffusion coefficients can be determined only in long time limit. At intermediate annealing times, when the grain boundaries are saturated but the bulk diffusion is still negligible, there are no changes in the composition profiles.This yields good qualitative agreement with the experimental data and offers explanation for the time and temperature dependence of the interdiffusion coefficients obtained in similar systems.

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On the influence of the stacking sequence in the nucleation of Cu3Si: Experiment and the testing of nucleation models

Cited by 19 publications

References 38 publications

Interdiffusion in amorphous AlxZr1-x alloys

Interdiffusion in amorphous AlxZr1-x alloys

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Nanoscale diffusion in Pt/56Fe/57Fe thin-film system

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