Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO<sub>2</sub> in reactor

Baris, Adrienn; Abolhassani, S.; Chiu, Yu-Lung; Evans, Hugh E.

doi:10.1080/09603409.2017.1392412

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…All these factors depend on the oxidation temperature and time, composition and fugacity of a medium, and chemical and phase composition of an alloy [23]. The obtained results here correspond to the previous reports regarding the temperature dependence of the oxide layer growth [25,[61][62][63][64][65][66][67], the complex multilayer and multiphase structure [68][69][70][71], growth of the oxide layer in columnar grains [68,72], and the appearance of porosity [25,33,[73][74][75] and cracks [76][77][78][79]. Interestingly, it was also noted that a severe descaling of the oxide layer appeared in these investigations at a relatively high temperature.…”

Section: Characteristics Of Oxide Layerssupporting

confidence: 88%

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

et al. 2020

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The present paper is aimed at determining the less investigated effects of hydrogen uptake on the microstructure and the mechanical behavior of the oxidized Zircaloy-2 alloy. The specimens were oxidized and charged with hydrogen. The different oxidation temperatures and cathodic current densities were applied. The scanning electron microscopy, X-ray electron diffraction spectroscopy, hydrogen absorption assessment, tensile, and nanoindentation tests were performed. At low oxidation temperatures, an appearance of numerous hydrides and cracks, and a slight change of mechanical properties were noticed. At high-temperature oxidation, the oxide layer prevented the hydrogen deterioration of the alloy. For nonoxidized samples, charged at different current density, nanoindentation tests showed that both hardness and Young’s modulus revealed the minims at specific current value and the stepwise decrease in hardness during hydrogen desorption. The obtained results are explained by the barrier effect of the oxide layer against hydrogen uptake, softening due to the interaction of hydrogen and dislocations nucleated by indentation test, and hardening caused by the decomposition of hydrides. The last phenomena may appear together and result in hydrogen embrittlement in forms of simultaneous hydrogen-enhanced localized plasticity and delayed hydride cracking.

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Section: Characteristics Of Oxide Layerssupporting

confidence: 88%

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

et al. 2020

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“…It has been demonstrated that most alloying elements dissolve from the secondary phase particles (SPP) and increase the matrix concentration of each element [19], [22]. It is clear that alloying elements could also have an impact on the conductivity; however, knowing that all alloying elements could play a role and their effect could also cumulate or counter balance each other [41] their impact with time will require a much more in depth analysis and is outside the scope of this study.…”

Section: Discussion Of Resultsmentioning

confidence: 95%

“…Further to the chemical analysis, the microstructure of the metal-oxide interface has been analysed in depth and it has been demonstrated that the 9-cycle oxide near the interface is much more porous, please refer to Figure 4. The role of porosity on the different properties of the oxide have been discussed by other authors and also in the laboratory [42], [19], [22], [23]. In a study performed previously, other researchers have shown that the porosity increases the resistivity of the oxide [42].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Characterization of the conductivity of metal-oxide interface of zirconium based fuel cladding at low and high burnups

Hawes

Baris

Chiu

et al. 2020

Journal of Nuclear Materials

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“…Bulk plutonium and uranium, as well as the distribution of plutonium oxide particles in the plutonium oxalate precipitates and UO 2 bubbles produced in high burnup, were also analyzed [203][204][205]. Baris compared the 3D microstructure of Ziraloy-2 LK3/L, used as a cladding material in a Swiss reactor, under the conditions of high and low irradiation from a boiling water reactor (BWR) [206,207]. Another important paper is that of Arregui-Mena and co-authors on the porosity of an AGX graphite, used as a moderator for fast neutrons, and the effect of irradiation on its microstructure [9,208].…”

Section: Materials For Nuclear Energymentioning

confidence: 99%

Advances in Focused Ion Beam Tomography for Three-Dimensional Characterization in Materials Science

Mura,

Cognigni,

Ferroni

et al. 2023

Materials

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Over the years, FIB-SEM tomography has become an extremely important technique for the three-dimensional reconstruction of microscopic structures with nanometric resolution. This paper describes in detail the steps required to perform this analysis, from the experimental setup to the data analysis and final reconstruction. To demonstrate the versatility of the technique, a comprehensive list of applications is also summarized, ranging from batteries to shale rocks and even some types of soft materials. Moreover, the continuous technological development, such as the introduction of the latest models of plasma and cryo-FIB, can open the way towards the analysis with this technique of a large class of soft materials, while the introduction of new machine learning and deep learning systems will not only improve the resolution and the quality of the final data, but also expand the degree of automation and efficiency in the dataset handling. These future developments, combined with a technique that is already reliable and widely used in various fields of research, are certain to become a routine tool in electron microscopy and material characterization.

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Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO₂ in reactor

Cited by 9 publications

References 12 publications

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

Characterization of the conductivity of metal-oxide interface of zirconium based fuel cladding at low and high burnups

Advances in Focused Ion Beam Tomography for Three-Dimensional Characterization in Materials Science

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Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO2 in reactor

Cited by 9 publications

References 12 publications

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

Hydrogen Embrittlement and Oxide Layer Effect in the Cathodically Charged Zircaloy-2

Characterization of the conductivity of metal-oxide interface of zirconium based fuel cladding at low and high burnups

Advances in Focused Ion Beam Tomography for Three-Dimensional Characterization in Materials Science

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Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO₂ in reactor