The Proceedings of Ibaraki District Conference
Online ISSN : 2424-2683
ISSN-L : 2424-2683
[volume title in Japanese]
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Evaluation of ultra-low loaded hardness and micro Vickers hardness of graphite materials for fusion reactors
*Reo TAKIGUCHIAkira KURUMADAGoroh ITOHHisao ATSUMI
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Pages 404-

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Abstract
Carbon fiber reinforced carbon composite (C/C composite) and tungsten materials are expected as divertor materials that receive the highest heat flux load in large-scale fusion experimental device. Graphite materials for fusion reactors, such as C/C composite, have extremely high heat resistance (sublimation point of 3,650K) and high thermal shock resistance, and can withstand high heat flux loads such as plasma disruption. Ultra-low loaded hardness and micro Vickers hardness tests were carried out on isotropic graphite (IG-430U), C/C composite (CX-2002U) and pyrolytic graphite (PyG) for fusion reactors. The microstructures were also observed by SEM. As the results, IG-430U had isotropic property. CX2002U had data variation due to fibers and pores. PyG had anisotropic property due to extreme layered structure. It was necessary to be performed by ultra-micro load of 200 mN in the ultra-low loaded hardness test. And the micro Vickers hardness test was not suitable for the graphite materials.
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© 2020 The Japan Society of Mechanical Engineers
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