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RISS 인기검색어
- 검색키워드
- 저자 : Kennouche, Salim (검색결과 2 건)
- 무료
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Three-dimensional microstructure of high-performance pulsed-laser deposited Ni–YSZ SOFC anodes
Kennouche, David,Hong, Jongsup,Noh, Ho-Sung,Son, Ji-Won,Barnett, Scott A. The Royal Society of Chemistry 2014 Physical chemistry chemical physics Vol.16 No.29
<P>The Ni–yttria-stabilized zirconia (YSZ) anode functional layer in solid oxide fuel cells produced by pulsed laser-deposition was studied using three-dimensional tomography. Anode feature sizes of ∼130 nm were quite small relative to typical anodes, but errors arising in imaging and segmentation were shown using a sensitivity analysis to be acceptable. Electrochemical characterization showed that these cells achieved a relatively high maximum power density of 1.4 W cm<SUP>−2</SUP> with low cell resistance at an operating temperature of 600 °C. The tomographic data showed anode three-phase boundary density of ∼56 μm<SUP>−2</SUP>, more than 10 times the value observed in conventional Ni–YSZ anodes. Anode polarization resistance values, predicted by combining the structural data and literature values of three-phase boundary resistance in an electrochemical model, were consistent with measured electrochemical impedance spectra, explaining the excellent intermediate-temperature performance of these cells.</P> <P>Graphic Abstract</P><P>Three-dimensional tomographic study of Ni–yttria-stabilized zirconia (YSZ) anode functional layer in solid oxide fuel cells produced by pulsed laser-deposition. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cp02251c'> </P>
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Mechanical and durability properties of concrete incorporating glass and plastic waste
Abdelli, Houssam Eddine,Mokrani, Larbi,Kennouche, Salim,Aguiar, J.L. Barroso de Techno-Press 2021 Advances in concrete construction Vol.11 No.2
The main objective of this work is to contribute to the valorization of plastic and glass waste in the improvement of concrete properties. Waste glass after grinding was used as a partial replacement of the cement with a percentage of 15%. The plastic waste was cut and introduced as fibers with 1% by the total volume of the mixture. Mechanical and durability tests were conducted for various mixtures of concrete as compressive and flexural strengths, water absorption, ultrasonic pulse velocity, and acid attack. Also, other in-depth analyses were performed on samples of each variant such as X-ray diffraction (XRD), thermogravimetric analysis (DSC-TGA), and scanning electron microscope (SEM). The results show that the addition of glass powder or plastic fibers or a combination of both in concrete improved in the compression and flexural strengths in the long term. The highest compressive strength was obtained in the mix which combines the two wastes about 26.72% of increase compared to the control concrete. The flexural strength increased in the mixture containing the glass powder. Therefore, the mixture with two wastes exhibits better resistance to aggressive sulfuric acid attack, and incorporating glass powder improves the ultrasonic pulse velocity.
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