Influence of alloying elements on grain-growth in Zr(Fe) and Cu(Fe) thin-films under in situ ion-irradiation

Kaoumi, Djamel; Motta, Arthur T.; Birtcher, R. C.

doi:10.1016/j.jnucmat.2008.08.011

Cited by 10 publications

(11 citation statements)

References 24 publications

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“…While nanocrystalline materials appear very promising in terms of radiation damage tolerance under certain energetic conditions, they suffer from a lack of microstructural stability and they are highly susceptible to grain growth even at low homologous temperatures [ 29 , 49 ]. Irradiation-induced grain growth has been observed in many materials at temperatures as low as −223 °C [ 9 , 12 , 31 , 32 , 33 , 34 , 35 , 36 ], which represents a temperature at which thermally driven grain growth would not be expected. Table 1 summarizes published results for irradiation-induced grain growth in pure Cu.…”

Section: Grain Size Impact On Stabilitymentioning

confidence: 99%

“…To deconvolute the complex grain growth phenomena caused by combinations of irradiation and thermal exposure, Kaoumi et al identified three grain growth regimes for nanocrystalline materials under irradiation: (1) a purely thermal regime at temperatures above recrystallization, (2) a thermally assisted regime where both irradiation and thermal effects contribute to the grain growth, and (3) an athermal regime where irradiation effects dominate [ 31 , 32 ]. The first regime has been well covered in the literature [ 52 ].…”

Section: Grain Growth Regimes In Combined Irradiation/thermal Environ...mentioning

confidence: 99%

“…In the second (irradiation and thermal effects) and third (primarily irradiation-driven grain growth) regimes, the irradiation–defect interactions come into play. Focusing on the third grain growth regime (irradiation-induced), grain growth has been explained using a thermal spike (e.g., thermal event) approach [ 32 , 35 , 50 , 56 , 57 ]. In this theory, when the collision event ends, the energy of the remaining recoil atoms is thermalized within the lattice, resulting in a localized temperature increase, called a thermal spike.…”

Section: Grain Growth Regimes In Combined Irradiation/thermal Environ...mentioning

confidence: 99%

“…As such, they are not thermodynamically stable and can lose their ability to tolerate damage during prolonged irradiation. Grain growth during irradiation has been observed in various materials even at low temperatures where no thermally induced grain growth would be expected [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. Further, at higher homologous temperatures this irradiation-induced grain growth couples with thermally driven grain growth.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and Radiation Stability in Nanocrystalline Cu

et al. 2023

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Nanocrystalline metals have presented intriguing possibilities for use in radiation environments due to their high grain boundary volume, serving as enhanced irradiation-induced defect sinks. Their promise has been lessened due to the propensity for nanocrystalline metals to suffer deleterious grain growth from combinations of irradiation and/or elevated homologous temperature. While approaches for stabilizing such materials against grain growth are the subject of current research, there is still a lack of central knowledge on the irradiation–grain boundary interactions in pure metals despite many studies on the same. Due to the breadth of available reports, we have critically reviewed studies on irradiation and thermal stability in pure, nanocrystalline copper (Cu) as a model FCC material, and on a few dilute Cu-based alloys. Our study has shown that, viewed collectively, there are large differences in interpretation of irradiation–grain boundary interactions, primarily due to a wide range of irradiation environments and variability in materials processing. We discuss the sources of these differences and analyses herein. Then, with the goal of gaining a more overarching mechanistic understanding of grain size stability in pure materials under irradiation, we provide several key recommendations for making meaningful evaluations across materials with different processing and under variable irradiation conditions.

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Section: Grain Size Impact On Stabilitymentioning

confidence: 99%

Section: Grain Growth Regimes In Combined Irradiation/thermal Environ...mentioning

confidence: 99%

Section: Grain Growth Regimes In Combined Irradiation/thermal Environ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal and Radiation Stability in Nanocrystalline Cu

et al. 2023

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“…The impact of irradiation on grain growth and grain boundary mobility in UO2 was investigated using in-situ ion irradiation as a function of temperature and irradiation dose. The hypothesis was that irradiation assisted grain growth is caused by atomic diffusion within the thermal spike [2]. This report summarizes the in-situ transmission electron microscope (TEM) experiments that were performed at the Intermediate Voltage Electron Microscope (IVEM) -Tandem facility in Argonne National Laboratory.…”

Section: Introductionmentioning

confidence: 99%