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Oxidation behavior of plasma sintered beryllium-titanium intermetallic compounds as an advanced neutron multiplier

Kim, Jae-Hwan; Nakamichi, Masaru

The advanced neutron multipliers are being developed by Japan and the EU in the DEMO R&D of the International Fusion Energy Research Centre (IFERC) project as part of Broader Approach (BA) activities from 2007 to 2016. We have suggested a plasma sintering method as a new method for beryllide and studies on the plasma sintered beryllides are ongoing. In the present study, oxidation property of plasma sintered beryllide was investigated at 1273 K for 24 hr under dry air. It was obvious from the result of thermal gravimetry that specimen with larger amount of Be$$_{12}$$Ti phase corresponding to that sintered for longer time showed superior oxidation property. Results of electron probe micro analyzer and X-ray diffraction analyses, demonstrated that BeO scales were entirely formed on the surface of Be and Be$$_{12}$$Ti phase, which it was not so different as compared to studies conducted so far. However oxidation behavior of Be$$_{2}$$Ti phase had different mechanism, showing formation of TiO$$_{2}$$ scale which were crystallized upon Be$$_{2}$$Ti phase, being formed outside of the island-like oxide scales while BeO scales were formed inside of the scales.

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Category:Materials Science, Multidisciplinary

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