Evaluation of mechanical properties of irradiated zirconium alloys in the vicinity of the metal-oxide interface

Colldeweih, Aaron W.; Baris, Adrienn; Spätig, P.; Abolhassani, S.

doi:10.1016/j.msea.2018.09.107

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…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%

“…The hydrogen pickup fraction of the cladding after 9 cycles had reached 30% compared to the 3-cycle cladding which was 17% [6]. This finding forms the basis for the motivation for the extensive characterisation and comparison of its high and low burnup samples [6], [19]- [23]. The advantage of this technique is the capability to measure the oxide conductivity at site specific regions of the material and provide the intrinsic properties of the region analysed.…”

Section: Introductionmentioning

confidence: 92%

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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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Section: Discussion Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

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

Self Cite

View full text Add to dashboard Cite

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“…section 3.2), a diameter of at least 40 µm is required to be representative of the investigated microstructures [53]. Secondly, an aspect ratio, defined as the ratio between the pillar height and its upper diameter, ranging between 2 and 3 is recommended in the literature for micro-compression testing [54,55].…”

Section: Porous Micro-pillarsmentioning

confidence: 99%

Fracture properties of porous yttria-stabilized zirconia under micro-compression testing

Abaza

Laurencin

Nakajo

et al. 2022

Journal of the European Ceramic Society

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Micro-compression tests were carried out on pillars of 60 µm in diameter, milled by plasma focused ion beam in porous Yttria-Stabilized Zirconia (YSZ) pellets. The fracture properties were determined over a wide range of porosities (33%-63%) for 8YSZ and at a given pore volume fraction of 63% for 3YSZ. The mechanical properties determined from testing were reproducible thanks to the homogeneity of the microstructures. The Young's modulus was estimated as a function of the porosity from the unloading curve of tests stopped before fracture. The experiments conducted until the total rupture allowed measuring the compressive fracture strength, which was found to decrease when increasing the porosity. Specimen tested and unloaded just before the total fracture were cross-sectioned by focused ion beam -scanning electron microscope. A transition was detected from a brittle behavior, with macro-cracks parallel to the direction of solicitation, to a diffuse damage with microcracks, when increasing the porosity.

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“…2a). In this frame, a special attention was paid to fulfil the geometrical recommendations regarding the specimen dimensions for accurate measurements (9,10). Indeed, as shown in Fig.…”

Section: Sample Preparationmentioning

confidence: 99%

“…The Ni swelling within the cermet generates high tensile stresses in the YSZ backbone leading to the apparition of micro-cracks (3). For classical anode supported cell, the mechanical damage of the ionic conducting phase within the cermet results in a substantial degradation of the overall cell performances (4)(5)(6)(7)(8)(9). It is therefore required to further enhance the hydrogen electrode robustness for a higher redox tolerance.…”

Section: Introductionmentioning

confidence: 99%

Fracture of Porous Ceramics: Application to the Mechanical Degradation of Solid Oxide Cell During Redox Cycling

et al. 2021

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A model based on the Phase Field approach has been developed to simulate the local fracture in porous electrode microstructures. The model capacity to predict the crack nucleation and propagation has been studied with theoretical considerations. For the model validation, micro-compression tests have been performed on porous YSZ micro-pillars. As expected, the compressive fracture strength has been found to decrease with the material porosity. Moreover, a transition in fracture mode has been detected from a brittle behavior toward a local damage when increasing the porosity. It has been shown that the model is able to reproduce correctly the experimental results. The validated model has been used to simulate the fracture of the YSZ backbone induced by the Ni re-oxidation in a typical Ni-YSZ cermet. The generation and localization of the micro-cracks have been discussed according to the degree of Ni re-oxidation and the local morphology of the electrode microstructure.

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Evaluation of mechanical properties of irradiated zirconium alloys in the vicinity of the metal-oxide interface

Cited by 12 publications

References 19 publications

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

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

Fracture properties of porous yttria-stabilized zirconia under micro-compression testing

Fracture of Porous Ceramics: Application to the Mechanical Degradation of Solid Oxide Cell During Redox Cycling

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