Design of Mechanical Properties of Open-Cell Porous Materials Based on μCT Study of Commercial Foams

Skibiński, Jakub; Ćwieka, Karol; Wejrzanowski, Tomasz; Kurzydłowski, Krzysztof J.

doi:10.1051/matecconf/20153003005

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…As the report [6] states, most common material that the anode is made of is porous sintered nickel, in some cases with small percentages of chromium or aluminum. The microstructure of such open-porous materials can be designed and optimized incorporating both experimental [7,8] and computational methods [9][10][11][12][13][14][15]. Moreover, computational methods at atomistic level are used for predicting of the interaction of gaseous media utilized for fuel cell operation with electrode materials of the electrodes.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Microstructure of Molten Carbonate Fuel Cell Anode

Wejrzanowski

Ćwieka

Milewski

et al. 2017

MSF

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Development of Molten Carbonate Fuel Cells is strongly governed by improvement of durability and efficiency of the main components. This can only be achieved by defining the relationships between structure and properties of materials for MCFC. Present work introduces the results of optimization of the manufacturing process parameters and characterization of materials obtained herewith. Tape-casting manufacturing technique based on forming of a slurry with strictly defined composition and properties was used. The influence of slurry composition and further heat treatment conditions are correlated with structural parameters such as porosity and pore morphology in final products.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Microstructure of Molten Carbonate Fuel Cell Anode

Wejrzanowski

Ćwieka

Milewski

et al. 2017

MSF

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“…After a few decades its applications widened (e.g., [21], [27], [28], [29]). The step by step nature of µCT use in the field of geosciences, involving data acquisition, reconstruction process and image processing field, was described in some depth by [2], [9], [17].…”

Section: Introductionmentioning

confidence: 99%

Numerical Approach in Recognition of Selected Features of Rock Structure from Hybrid Hydrocarbon Reservoir Samples Based on Microtomography

Kaczmarek

Zhao

Konietzky

et al. 2017

Studia Geotechnica Et Mechanica

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Abstract:The study employs numerical calculations in the characterization of reservoir sandstone samples based on high-resolution X-ray computed microtomography. The major goals were to determine porosity through pore size distribution, permeability characterization through pressure field, and structure impact on rock strength by simulation of a uniaxial compression test. Two Miocene samples were taken from well S-3, located in the eastern part of the Carpathian Foredeep. Due to the relation between sample size and image resolution, two X-ray irradiation series with two different sample sizes were performed. In the first approach, the voxel side was 27 µm and in the second it was up to 2 µm. Two samples from different depths have been studied here. Sample 1 has petrophysical features of conventional reservoir deposits, in contrast to sample 2. The approximate grain size of sample 1 is in the range 0.1-1.0 mm, whereas for sample 2 it is 0.01-0.1 mm with clear sedimentation lamination and heterogenic structure. The porosity, as determined by µCT, of sample 1 is twice (10.3%) that of sample 2 (5.3%). The equivalent diameter of a majority of pores is less than 0.027 mm and their pore size distribution is unimodal right-hand asymmetrical in the case of both samples. In relation to numerical permeability tests, the flow paths are in the few privileged directions where the pressure is uniformly decreasing. Nevertheless, there are visible connections in sample 1, as is confirmed by the homogenous distribution of particles in the pore space of the sample and demonstrated in the particle flow simulations. The estimated permeability of the first sample is approximately four times higher than that of the second one. The uniaxial compression test demonstrated the huge impact of even minimal heterogeneity of samples in terms of micropores: 4-5 times loss of strength compared to the undisturbed sample. The procedure presented shows the promising combination of microstructural analysis and numerical simulations. More specific calculations of lab tests with analysis of variable boundary conditions should be performed in the future.

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“…The aim of the present study was to design structure of the material for optimal performance and durability of non-polarizing electrode. Optimization of chemical composition using density functional theory (DFT) is often addressed regarding electrodes design [3,4], however the approach proposed in this work employs design procedure of the complex open-porosity structure of the material [5][6][7] with use of authors software combined with subsequent finite volume method analysis. To this end a set of porous model structures with different structural parameters was generated using Laguerre-Voronoi tessellations [8].…”

Section: Introductionmentioning

confidence: 99%

Design of Reservoir Recognition Technique Component - Open Porosity in Non-Polarizing Electrodes

Skibiński

Wejrzanowski

Kurzydłowski

2017

MSF

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In the present study modeling of permeability of open-porosity ceramic materials used in non-polarizing electrodes is addressed. The structure of the material filling the electrode determines the infiltration of the ceramic structure by electrolyte, which influences the efficiency of the electrodes. The composition of electrode material was characterized with Scanning Electron Microscope Hitachi S3500N with EDS detector and the structure was determined with use of XRadia XCT400 tomograph . The complex geometry of porous materials has been designed using procedure based on Laguerre-Voronoi tessellations (LVT). A set of porous structures with different geometrical features has been developed using LVT algorithm. The approach used here allows to investigate the influence of geometrical features such pore size variation on the permeability of studied materials. Pressure drop characteristics of the developed structures has been analyzed using finite volume method (FVM). The results show that permeability of porous materials is strongly related with distribution of pore size. The study exhibits the utility of developed design procedure for optimization of non-polarizing electrodes performance.

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Design of Mechanical Properties of Open-Cell Porous Materials Based on μCT Study of Commercial Foams

Cited by 4 publications

References 26 publications

Optimization of the Microstructure of Molten Carbonate Fuel Cell Anode

Optimization of the Microstructure of Molten Carbonate Fuel Cell Anode

Numerical Approach in Recognition of Selected Features of Rock Structure from Hybrid Hydrocarbon Reservoir Samples Based on Microtomography

Design of Reservoir Recognition Technique Component - Open Porosity in Non-Polarizing Electrodes

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