Hydride growth mechanism in zircaloy-4: Investigation of the partitioning of alloying elements

Mouton, Isabelle; Chang, Yanhong; Chakraborty, Poulami; Wang, Siyang; Stephenson, Leigh T.; Britton, T. Ben; Gault, Baptiste

doi:10.1016/j.mtla.2021.101006

Cited by 21 publications

(12 citation statements)

References 36 publications

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“…Further discussions on these aspects can be found in Ref. [38] for instance, it is well established that the detection of spurious hydrogen is related to the strength of the electrostatic field applied during the analysis [39], which can be traced back by the ratio of charge-states [40][41][42][43]. Across the four datasets analysed for each of the material's states, the average Fe 2+ /(Fe 1+ +Fe 2+ ) ratio was 99.96±0.002% and 99.78±0.05% for the as-received and hydrogenated samples respectively.…”

Section: Atom Probe Tomographymentioning

confidence: 99%

The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material

Wang

Gavaldà-Diaz

Luo

et al. 2022

Journal of Alloys and Compounds

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Section: Atom Probe Tomographymentioning

confidence: 99%

The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material

Wang

Gavaldà-Diaz

Luo

et al. 2022

Journal of Alloys and Compounds

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“…Even if the presence of H atoms in a sample can be undesired, contamination may occur during the specimen preparation and transport, or during the measurement itself. The importance of controlling the temperature during specimen preparation was recently pointed out for several alloy systems [12,53], and in particular for materials systems that are known hydrideformers [10]. Breen et al demonstrated the strong ingress of hydrogen arising from the specimen preparation by electrochemical polishing [9].…”

Section: Discussion a Origin Of The Detected Hydrogenmentioning

confidence: 99%

Origins of the hydrogen signal in atom probe tomography

Yoo,

Kim,

Woods

et al. 2021

Preprint

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Atom Probe Tomography (APT) analysis is being actively used to provide near-atomic-scale information on the composition of complex materials in three-dimensions. In recent years, there has been a surge of interest in the technique to investigate the distribution of hydrogen in metals.However, the presence of hydrogen in the analysis of almost all specimens from nearly all material systems has caused numerous debates as to its origins and impact on the quantitativeness of the measurement. It is often perceived that most H arises from residual gas ionization, therefore affecting primarily materials with a relatively low evaporation field. In this work, we perform systematic investigations to identify the origin of H residuals in APT experiments by combining density-functional theory (DFT) calculations and APT measurements on an alkali and a noble metal, namely Na and Pt, respectively. We report that no H residual is found in Na metal samples, but in Pt, which has a higher evaporation field, a relatively high signal of H is detected. These results contradict the hypothesis of the H signal being due to direct ionization of residual H 2 without much interaction with the specimen's surface. Based on DFT, we demonstrate that alkali metals are thermodynamically less likely to be subject to H contamination under APT-operating conditions compared to transition or noble metals. These insights indicate that the detected H-signal is not only from ionization of residual gaseous H 2 alone, but is strongly influenced by materialspecific physical properties. The origin of H residuals is elucidated by considering different conditions encountered during APT experiments, specifically, specimen-preparation, transportation, and APT-operating conditions by taking thermodynamic and kinetic aspects into account.

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“…52 The O pick-up could have taken place either during the specimen preparation at room temperature inside the (P)FIB or during transport through air. Hydrogen pick-up was demonstrated in some metallic materials and was suppressed by using low-temperature 35,53 FIB specimen preparation. This was not reported in oxides though, and the extremely low levels of O contamination found following cryo-PFIB preparation of APT specimens from pure Mg may dismiss this possibility.…”

Section: Intrinsic Shieldingmentioning

confidence: 99%

Atom probe analysis of electrode materials for Li-ion batteries: challenges and ways forward

et al. 2022

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Hydride growth mechanism in zircaloy-4: Investigation of the partitioning of alloying elements

Cited by 21 publications

References 36 publications

The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material

The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material

Origins of the hydrogen signal in atom probe tomography

Atom probe analysis of electrode materials for Li-ion batteries: challenges and ways forward

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