The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Marc Dupuis - One of the best experts on this subject based on the ideXlab platform.
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Light Metals 2011 - DEVELOPMENT AND APPLICATION OF AN ANSYS BASED THERMO-ELECTRO-MECHANICAL COLLECTOR BAR SLOT DESIGN TOOL
Light Metals 2011, 2011Co-Authors: Marc DupuisAbstract:After the successful development and application of an ANSYS based thermo-electro-mechanical anode stub hole design tool [1], an ANSYS based thermo-electro-mechanical collector bar slot design tool has been developed. Since the average contact resistance at the cast iron/cathode block Interface is higher than the contact resistance at the cast iron/anode Carbon Interface, the potential for mV savings is even greater.
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Development and Application of an ANSYS Based Thermo-electro-mechanical Collector Bar Slot Design Tool
Light Metals 2011, 2011Co-Authors: Marc DupuisAbstract:After the successful development and application of an ANSYS based thermo-electro-mechanical anode stub hole design tool [1], an ANSYS based thermo-electro-mechanical collector bar slot design tool has been developed. Since the average contact resistance at the cast iron/cathode block Interface is higher than the contact resistance at the cast iron/anode Carbon Interface, potential for mV savings is even greater. the A demonstration model has been developed and used to study different collector bar slot configurations. The results obtained are presented. Introduction
A Kohyama - One of the best experts on this subject based on the ideXlab platform.
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influence of pyrolytic Carbon Interface thickness on microstructure and mechanical properties of sic sic composites by nite process
Composites Science and Technology, 2008Co-Authors: Kazuya Shimoda, Joonsoo Park, Tatsuya Hinoki, A KohyamaAbstract:Unidirectional SiC/SiC composites were prepared by Nano-Infiltration and Transient Eutectic-phase (NITE) process using SiC nano-powder infiltration technique, and the effects of pyrolytic Carbon (PyC) Interface thickness between fibers and matrix on density, microstructural evolution and mechanical properties were characterized. SiC fibers both with and without PyC Interface were employed as reinforcement and SiC nano-powder was employed for matrix formation with 12 mass% sintering additives of the total powder. The thickness of PyC layer deposited by chemical vapor deposition (CVD) process was highly-accurately controlled at about 0.25, 0.50 and 1.00 μm. Nearly full-dense SiC/SiC composites with uncoated fibers caused strong interaction between fibers and matrix, resulting in a brittle fracture behavior without fiber pull-out. Higher strength with a pseudo-ductile fracture behavior could be obtained using 0.50 μm of PyC Interface thickness, where a lot of deflects and branches of the propagating cracks and fiber pull-out were observed. Induced PyC Interface conditions strongly affect the density, microstructural evolution, and therefore dominate mechanical properties and fracture behaviors.
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Influence of pyrolytic Carbon Interface thickness on microstructure and mechanical properties of SiC/SiC composites by NITE process
Composites Science and Technology, 2008Co-Authors: Kazuya Shimoda, Joonsoo Park, Tatsuya Hinoki, A KohyamaAbstract:Unidirectional SiC/SiC composites were prepared by Nano-Infiltration and Transient Eutectic-phase (NITE) process using SiC nano-powder infiltration technique, and the effects of pyrolytic Carbon (PyC) Interface thickness between fibers and matrix on density, microstructural evolution and mechanical properties were characterized. SiC fibers both with and without PyC Interface were employed as reinforcement and SiC nano-powder was employed for matrix formation with 12 mass% sintering additives of the total powder. The thickness of PyC layer deposited by chemical vapor deposition (CVD) process was highly-accurately controlled at about 0.25, 0.50 and 1.00 μm. Nearly full-dense SiC/SiC composites with uncoated fibers caused strong interaction between fibers and matrix, resulting in a brittle fracture behavior without fiber pull-out. Higher strength with a pseudo-ductile fracture behavior could be obtained using 0.50 μm of PyC Interface thickness, where a lot of deflects and branches of the propagating cracks and fiber pull-out were observed. Induced PyC Interface conditions strongly affect the density, microstructural evolution, and therefore dominate mechanical properties and fracture behaviors.
Kazuya Shimoda - One of the best experts on this subject based on the ideXlab platform.
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influence of pyrolytic Carbon Interface thickness on microstructure and mechanical properties of sic sic composites by nite process
Composites Science and Technology, 2008Co-Authors: Kazuya Shimoda, Joonsoo Park, Tatsuya Hinoki, A KohyamaAbstract:Unidirectional SiC/SiC composites were prepared by Nano-Infiltration and Transient Eutectic-phase (NITE) process using SiC nano-powder infiltration technique, and the effects of pyrolytic Carbon (PyC) Interface thickness between fibers and matrix on density, microstructural evolution and mechanical properties were characterized. SiC fibers both with and without PyC Interface were employed as reinforcement and SiC nano-powder was employed for matrix formation with 12 mass% sintering additives of the total powder. The thickness of PyC layer deposited by chemical vapor deposition (CVD) process was highly-accurately controlled at about 0.25, 0.50 and 1.00 μm. Nearly full-dense SiC/SiC composites with uncoated fibers caused strong interaction between fibers and matrix, resulting in a brittle fracture behavior without fiber pull-out. Higher strength with a pseudo-ductile fracture behavior could be obtained using 0.50 μm of PyC Interface thickness, where a lot of deflects and branches of the propagating cracks and fiber pull-out were observed. Induced PyC Interface conditions strongly affect the density, microstructural evolution, and therefore dominate mechanical properties and fracture behaviors.
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Influence of pyrolytic Carbon Interface thickness on microstructure and mechanical properties of SiC/SiC composites by NITE process
Composites Science and Technology, 2008Co-Authors: Kazuya Shimoda, Joonsoo Park, Tatsuya Hinoki, A KohyamaAbstract:Unidirectional SiC/SiC composites were prepared by Nano-Infiltration and Transient Eutectic-phase (NITE) process using SiC nano-powder infiltration technique, and the effects of pyrolytic Carbon (PyC) Interface thickness between fibers and matrix on density, microstructural evolution and mechanical properties were characterized. SiC fibers both with and without PyC Interface were employed as reinforcement and SiC nano-powder was employed for matrix formation with 12 mass% sintering additives of the total powder. The thickness of PyC layer deposited by chemical vapor deposition (CVD) process was highly-accurately controlled at about 0.25, 0.50 and 1.00 μm. Nearly full-dense SiC/SiC composites with uncoated fibers caused strong interaction between fibers and matrix, resulting in a brittle fracture behavior without fiber pull-out. Higher strength with a pseudo-ductile fracture behavior could be obtained using 0.50 μm of PyC Interface thickness, where a lot of deflects and branches of the propagating cracks and fiber pull-out were observed. Induced PyC Interface conditions strongly affect the density, microstructural evolution, and therefore dominate mechanical properties and fracture behaviors.
S. P. S. Badwal - One of the best experts on this subject based on the ideXlab platform.
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Yttria-doped ceria anode for Carbon-fueled solid oxide fuel cell
Journal of Solid State Electrochemistry, 2015Co-Authors: A. Kulkarni, S. Giddey, S. P. S. BadwalAbstract:Direct Carbon fuel cells offer twice the efficiency compared with conventional coal-fired power plants and the highest efficiency among various fuel cells. However, the delivery of solid fuel to electrode/electrolyte Interface is a critical issue and hinders the long-term performance of the fuel cell. The use of mixed ionic electronic conducting anodes has the potential to reduce the problem by shifting the fuel oxidation reaction from anode/electrolyte to anode/solid Carbon Interface. In search for a better anode material, Y_2O_3-doped ceria has been investigated as a suitable anode material for use in direct Carbon fuel cells and the performance compared with Gd_2O_3-doped ceria. These materials have high ionic conductivity in oxidizing environments and are also known to have reasonable mixed ionic and electronic conductivity in reducing environments. In this manuscript, the stability of the anode materials in fuel cell operating environments has been investigated with X-ray diffraction (XRD) and scanning electron microscopy. Electrochemical impedance spectroscopy, in pure N_2 and CO_2/N_2 anode chamber atmospheres, has been used to deconvolute the contribution of various fuel cell components to voltage losses and to elucidate the reaction mechanism. No precious metals were used on the anode side, neither as a catalyst nor as a current collector.
Yabing Qi - One of the best experts on this subject based on the ideXlab platform.
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Highly Efficient and Stable Perovskite Solar Cells via Modification of Energy Levels at the Perovskite/Carbon Electrode Interface
Advanced Materials, 2019Co-Authors: Zhifang Wu, Zonghao Liu, Zhanhao Hu, Zafer Hawash, Longbin Qiu, Luis K. Ono, Yan Jiang, Yabing QiAbstract:Abstract Perovskite solar cells (PSCs) have attracted great attention in the past few years due to their rapid increase in efficiency and low-cost fabrication. However, instability against thermal stress and humidity is a big issue hindering their commercialization and practical applications. Here, by combining thermally stable formamidinium?cesium-based perovskite and a moisture-resistant Carbon electrode, successful fabrication of stable PSCs is reported, which maintain on average 77% of the initial value after being aged for 192 h under conditions of 85 °C and 85% relative humidity (the ?double 85? aging condition) without encapsulation. However, the mismatch of energy levels at the Interface between the perovskite and the Carbon electrode limits charge collection and leads to poor device performance. To address this issue, a thin-layer of poly(ethylene oxide) (PEO) is introduced to achieve improved interfacial energy level alignment, which is verified by ultraviolet photoemission spectroscopy measurements. Indeed as a result, power conversion efficiency increases from 12.2% to 14.9% after suitable energy level modification by intentionally introducing a thin layer of PEO at the perovskite/Carbon Interface.