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Effect of grain size on the hardness and reactivity of plasma-sintered beryllium

プラズマ焼結製ベリリウムにおける硬さ及び反応性に与える粒径の影響

金 宰煥; 中道 勝

Kim, Jae-Hwan; Nakamichi, Masaru

Beryllium and its intermetallic compounds have attracted great attention as promising neutron multipliers in fusion reactors. In this study, mechanical and chemical properties of fabricated plasma-sintered beryllium (PS-Be) with different grain-sizes are investigated. Density and hardness analysis results of the fabricated PS-Be samples infer that a smaller grain size in the sintered Be indicates higher porosity and hardness. Sintered Be with a large grain size exhibits better resistance toward oxidation at 1273 Kin dry air and at 1073 K in Ar/1% H$$_{2}$$O, since oxidation at the grain boundaries of the determines the rate. In contrast, at 1273 K in Ar/1% H$$_{2}$$O, a catastrophic oxidation is indicated by the increase of weight of the samples and the generation of H$$_{2}$$ from the bulk Be.

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パーセンタイル:30.82

分野:Materials Science, Multidisciplinary

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