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Mesocarbon microbeads (MCMBs) are attractive precursors for high-density, high-strength polycrystalline graphite due to their self-sintering capability. They have the shape of a standard sphere and stack in a completely random orientation during compaction, thereby leading to an isotropic texture. In this paper, MCMB-based graphite shows better isotropic property than commercial nuclear graphite,...
Graphite materials are used in high-temperature gas-cooled reactor (HTR) as moderator and reflector. Nuclear graphite is currently manufactured using coke as the filler; however, improvements in the performance of nuclear graphite are anticipated in order to enhance the safety and lifetime of HTRs. Natural microcrystalline graphite (MG), which is a metamorphic product of coal, is an emerging candidate...
We demonstrate the potential use of asphalt emulsions as a binder for the preparation of polycrystalline graphite. An emulsion mixing method was adopted to create the natural microcrystalline graphite and asphalt binder mixture, and graphite samples with a bulk density of 1.7g/cm 3 and a flexural strength of ca. 22MPa were prepared. This approach is advantageous because of the uniformity of...
Graphite artifacts were prepared using mesocarbon microbeads (MCMBs) with two different extents of oxidation, lightly oxidized MCMBs (M-LO) and highly oxidized MCMBs (M-HO). Cold isostatic pressing at 200MPa was used in the formation process. Physical properties of the obtained artifacts prepared with two raw materials are quite different, the reason can be found in their pyrolysis behavior and sintering...
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