Nano‐characterization of Cast Structures by FIB‐Tomography

Lasagni, Fernando; Lasagni, Andrés Fabían; Engstler, Michael; Degischer, H. P.; Mücklich, Frank

doi:10.1002/adem.200700249

Cited by 43 publications

(26 citation statements)

References 20 publications

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“…Starting from there, FIB tomography was developed further and found application in several fields of interest such as biology [13], metallurgy [14,15] and medicine [16]. Wilson et al [17] were able to reconstruct a defined volume of a solid oxide fuel cell (SOFC) anode with the three different phases Ni, yttrium-stabilised zirconia (YSZ) and pore space.…”

Section: Introductionmentioning

confidence: 99%

3D Visualisation of PEMFC Electrode Structures Using FIB Nanotomography

et al. 2010

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It is well known that the electrode structure of a PEMFC has a huge influence on the water management and thereby on the cell performance. In this work, two MEAs – one prepared by an airbrushing technique and the other by a novel fast spray coating technique (multilayered MEA) – were analysed with respect to porosity, pore size distribution, tortuosity and their electrochemical performance. FIB nanotomography with following 3D reconstruction, SEM investigation on ultramicrotomic thin‐sections, and single cell tests were performed on these MEAs. The results show a higher porosity and lower pore size for the multilayered MEA. The multilayered MEA reaches a Pt utilisation of 1,962 mW mg–1 and a peak power density of 210 mW cm–2, whereas the airbrushed MEA only provides a Pt utilisation of 879 mW mg–1 and a peak power density of 218 mW cm–2. The Pt utilisation calculations showed in combination with the structural characterisations that a homogeneous pore structure and Pt distribution provide an advantage with regard to performance and efficiency of the PEMFC. Furthermore, the multilayered MEA may offer an advantage over the airbrushed MEA in its long term stability, which was observed in preliminary tests.

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Section: Introductionmentioning

confidence: 99%

3D Visualisation of PEMFC Electrode Structures Using FIB Nanotomography

et al. 2010

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“…The reconstruction of the Al-Si eutectic has been done by using FIB-SEM dual beam tomography. The technique provides a high resolution of less than 50-60 nm [10] and allows imaging of microstructure morphology constituents with a good contrast. FIB-SEM tomography reconstruction consists of iterative milling of the sample with ion beam and imaging of the sectioned planes with electron beam after removing a slice of a certain thickness from the sample.…”

Section: Materials and Imagingmentioning

confidence: 99%

Competitive stochastic growth model for the 3D morphology of eutectic Si in Al–Si alloys

Gaiselmann

Stenzel

Kruglova

et al. 2013

Computational Materials Science

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A competitive stochastic growth model is developed for the simulation of the 3D morphology of eutectic silicon in Al-Si alloys, which represents the colonies of pairwise disconnected Si corals in an Al matrix. The model is based on ideas from stochastic geometry and multivariate time series analysis. The 3D model is validated by comparing morphological characteristics computed for experimental 3D FIB-SEM data, and for realizations drawn from the model. Good agreement between the simulation model and the experimental image data is shown confirming the efficiency of using the competitive stochastic growth model for the generation of virtual eutectic silicon morphologies.

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“…Three-dimensional reconstructions of microstructural data have become an important tool in analysing and gaining understanding of multiphase material systems on the microstructure level [1][2][3]. These material systems include solid oxide fuel cell (SOFC) electrodes where the distribution and interconnectivity of constituent phases are of critical importance for the electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%