Bonding test of beryllides by plasma sintering method

Nakamichi, Masaru; Yonehara, Kazuo

Advanced neutron multipliers with lower swelling and higher stability at high temperature are desired in pebble bed blankets. Development of advanced neutron multiplier has been started in the DEMO R&D as a part of the broader approach activities. Beryllium intermetallic compounds (beryllides) are the most promising advanced neutron multipliers. In the previous study, it was clear that the intermetallic compound beryllides of Be-Ti can be directly synthesized by the plasma sintering method. In this study, it reports on the preliminary results of bonding test of beryllides using this plasma sintering method. There is no joint interface or boundary line in the joint sample. Structure between joint interface and bulk regions is same structure. Hardness between joint interface and bulk material were almost the same. It was clear that the beryllides could be directly synthesized and jointed by the plasma sintering method.