X-ray micro-tomography studies on carbon based composite materials for porosity network characterization

Tiseanu, Ion; Tsitrone, Emanuelle; Kreter, A.; Craciunescu, T.; Loarer, Tierry; Pégouriè, B.; Dittmar, T.

doi:10.1016/j.fusengdes.2011.04.079

Cited by 24 publications

(10 citation statements)

References 9 publications

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“…These three contributions (see Table 1) represent more than 90 % of the total porosity and about 60 % of the total specific area measured by adsorption isotherm for a millimeter-size sample. These results are in good agreement with the characterization of CFC NB31 by X-ray l-tomography [20], evidencing the strong interconnectivity of the pore network.…”

Section: Resultssupporting

confidence: 87%

“…10b) is correctly reproduced, but not the progressive steepening of the tail with decreasing fluence. This is likely due to the model geometry when X-ray l-tomography measurements show bents and abrupt changes in the porosity section [20]. Such an irregular shape could favor the local accumulation of particles, and therefore a faster plugging of the pore network, closer to the surface than what is predicted for a rectilinear regular shape.…”

Section: Discussion and Modelingmentioning

confidence: 95%

“…Practically, hri, V p , and S eff were taken from Table 1, considering only the three dominant pore types observed in NB31. The average angle hhi is the only parameter which is not experimentally determined, but Xray l-tomography characterization of NB31 [20] shows that the pores are roughly evenly distributed in the three directions of space. As a consequence, a constant value of hhi = 45°was used in the simulations, with no attempt to optimize this value-pore per pore or by considering some distribution of angles-for fitting better the measurements.…”

Section: Discussion and Modelingmentioning

confidence: 99%

See 2 more Smart Citations

Multi-technique coupling for analysis of deuterium retention in carbon fiber composite NB31

Bernard¹,

Khodja²,

Pégouriè³

et al. 2015

J Mater Sci

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International audienceThis paper presents an extensive set of measurements from complementary surface analysis techniques performed for characterizing deuterium retention in carbon fiber composite Sepcarb®NB31 subsequently to a deuterium beam exposition: adsorption isotherm measurements and Hg porosimetry to characterize the porous network, coupled deuterium beam exposure and in situ µ-NRA analysis to follow the dynamics of the penetration of the retained deuterium in the material, TEM and Raman microscopy to investigate the change in the material structure induced by ion irradiation, and finally TPD to estimate the respective proportion of deuterium retained in the surface layer and in the bulk material. The parameters extracted from this set of characterizations are introduced in a 2D Monte Carlo model which couples the propagation of deuterium and eroded carbon atoms in a network of rectilinear pores and plasma–surface interaction parameters from the SRIM code. The simulations reproduce satisfactorily the main features of the measured deuterium concentration profile and behavior of the retained deuterium amount with incident fluence, validating the physical picture of deuterium retention in CFC as due to the simultaneous implantation of the incident ions in the few 10-nm-depth layer the closest to the surface and penetration of atoms deeper in the material (several tens of microns) through the pore networ

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Section: Resultssupporting

confidence: 87%

Section: Discussion and Modelingmentioning

confidence: 95%

Section: Discussion and Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Multi-technique coupling for analysis of deuterium retention in carbon fiber composite NB31

Bernard¹,

Khodja²,

Pégouriè³

et al. 2015

J Mater Sci

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“…The X-ray tomographic experiments were performed on our newly upgraded cone-beam X-ray tomography facility [5][6] (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Advanced x-ray imaging of metal-coated/impregnated plasma-facing composite materials

et al. 2011

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PACS: 81.70.Tx, 78.70.En. AbstractA combination of X-ray imaging techniques is employed for the characterization of coated/impregnated carbon based composite materials to be used as Plasma Facing Components (PFC) in fusion devices. X-ray micro-tomography (µXCT) is applied for the visualization of Carbon Fiber Composites (CFC) -Cu joined samples and also for the CFC material porosity network characterization. The quantitative determination of the tungsten coating thickness on carbon materials is performed using a combined absorption/fluorescence X-ray technique (µXRFT). The method was applied at the analysis of W coated fine grain graphite (FGG) and CFC tiles. The X-ray imaging techniques provide fast analysis and high spatial resolution.

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“…What is the volume fraction of pores connected with the top as well as the bottom face of the slice? Notice that the percolation probability P 0 is exactly what is meant e. g. by the in-depth fuel migration into the pore space of the carbon reinforced carbon fiber (CFC) materials considered in [24].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the probability of finite percolation in porous microstructures from tomographic images

Ohser¹,

Ferrero

Wirjadi

et al. 2012

International Journal of Materials Research

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Percolation is an important property of porous media, as it describes the connectivity of pores. We propose a novel, direction-dependent percolation probability which can be efficiently estimated from three-dimensional images obtained by microtomography. Furthermore, in order to describe the penetrability of the pore space by particles of a given diameter or a fluid of a given surface tension, we introduce a percolation probability depending on the width of the pores, from which we may also derive a measure of the mean pore channel width. As application examples, we consider the penetrability of porous beryllium pebbles, the connectivity of pores in arctic firn, the percolation of the pore space of aluminum foams and the mean width of the percolating space between the fibers in a laminate's percolating pore space

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X-ray micro-tomography studies on carbon based composite materials for porosity network characterization

Cited by 24 publications

References 9 publications

Multi-technique coupling for analysis of deuterium retention in carbon fiber composite NB31

Multi-technique coupling for analysis of deuterium retention in carbon fiber composite NB31

Advanced x-ray imaging of metal-coated/impregnated plasma-facing composite materials

Estimation of the probability of finite percolation in porous microstructures from tomographic images

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