DC electrical conductivity of silicon carbide ceramics and composites for flow channel insert applications

Katoh, Yutai; Kondo, Sosuke; Snead, Lance Lewis

doi:10.1016/j.jnucmat.2008.12.237

Cited by 41 publications

(12 citation statements)

References 18 publications

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“…The electrical conductivity of the PyC interphase is relatively insensitive to irradiation and may decrease or increase, depending on its starting microstructure. Fission neutron data up ∼8 dpa indicate that the through-thickness electrical conductivity of the 2D SiC/SiC with thin PyC interphase material will likely be of the order of ∼10 S/m in the typical operating temperature range for FCIs [124]. However, nuclear transmutations in the fusion neutron environment produce significantly higher concentrations of solid elements which have the potential to modify the electronic properties of SiC since it is an impurity semiconductor.…”

Section: Sic Flow Channel Insertsmentioning

confidence: 99%

Blanket/first wall challenges and required R&D on the pathway to DEMO

Abdou

Morley

Smolentsev

et al. 2015

Fusion Engineering and Design

283

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a b s t r a c tThe breeding blanket with integrated first wall (FW) is the key nuclear component for power extraction, tritium fuel sustainability, and radiation shielding in fusion reactors. The ITER device will address plasma burn physics and plasma support technology, but it does not have a breeding blanket. Current activities to develop "roadmaps" for realizing fusion power recognize the blanket/FW as one of the principal remaining challenges. Therefore, a central element of the current planning activities is focused on the question: what are the research and major facilities required to develop the blanket/FW to a level which enables the design, construction and successful operation of a fusion DEMO? The principal challenges in the development of the blanket/FW are: (1) the Fusion Nuclear Environment -a multiple-field environment (neutrons, heat/particle fluxes, magnetic field, etc.) with high magnitudes and steep gradients and transients; (2) Nuclear Heating in a large volume with sharp gradients -the nuclear heating drives most blanket phenomena, but accurate simulation of this nuclear heating can be done only in a DT-plasma based facility; and (3) Complex Configuration with blanket/first wall/divertor inside the vacuum vessel -the consequence is low fault tolerance and long repair/replacement time.These blanket/FW development challenges result in critical consequences: (a) non-fusion facilities (laboratory experiments) need to be substantial to simulate multiple fields/multiple effects and must be accompanied by extensive modeling; (b) results from non-fusion facilities will be limited and will not fully resolve key technical issues. A DT-plasma based fusion nuclear science facility (FNSF) is required to perform "multiple effects" and "integrated" experiments in the fusion nuclear environment; and (c) the Reliability/Availability/Maintainability/Inspectability (RAMI) of fusion nuclear components is a major challenge and is one of the primary reasons why the blanket/FW will pace fusion development toward a DEMO.This paper summarizes the top technical issues and elucidates the primary challenges in developing the blanket/first wall and identifies the key R&D needs in non-fusion and fusion facilities on the path to DEMO.Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Sic Flow Channel Insertsmentioning

confidence: 99%

Blanket/first wall challenges and required R&D on the pathway to DEMO

Abdou

Morley

Smolentsev

et al. 2015

Fusion Engineering and Design

283

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“…As described by Y. Katoh [12], SiC is the candidate material for FCI, because of its good electrical and heat insulating characteristic. And its constitutive relation meet generalized Hooke law in elastic state.…”

Section: Governing Equations and Solution Methodsmentioning

confidence: 99%

Heat transfer and thermal stress analysis in fluid-structure coupled field

Pan

et al. 2015

Applied Thermal Engineering

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“…• C [22]. In the case of silicon, electrical conductivity at 400 • C has about twice the value at room temperature [23].…”

Section: Electrical Conductivitymentioning

confidence: 97%

Electrical Conductivity of SiC/Si Composites Obtained from Wood Preforms

Béjar

Mena

Toro

2011

Zeitschrift Für Naturforschung A

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Biomorphic SiC/Si composites were produced from pine and beech wood, and the corresponding electrical conductivity was determined as a function of the temperature. Firstly, wood preforms were pyrolized at 1050 • C in nitrogen. Then, the pyrolized preforms were impregnated with liquid silicon and kept at 1600 • C for 2 h in vacuum. The SiC/Si composites were obtained due to the produced carbothermal reaction. As expected, the resulting electrical conductivity of these composites increased with the temperature and with the silicon content.

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DC electrical conductivity of silicon carbide ceramics and composites for flow channel insert applications

Cited by 41 publications

References 18 publications

Blanket/first wall challenges and required R&D on the pathway to DEMO

Blanket/first wall challenges and required R&D on the pathway to DEMO

Heat transfer and thermal stress analysis in fluid-structure coupled field

Electrical Conductivity of SiC/Si Composites Obtained from Wood Preforms

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