202 リチウム含有セラミックス微小球の強度評価手法(OS 結合・接触問題の材料強度評価(1))

抄録

Lithium titanate (Li_2Ti0_3) pebbles are considered to be a candidate material of the tritium breeders for fusion reactor from viewpoints of good tritium recovery, chemical stability, etc. The pebbles of 0.3-2mm in diameter have been fabricated by a wet process, and characterization such as chemical property, tritium release property, mechanical property and so on have been performed. Especially, mechanical properties such as compressive strength are necessary for the design of fusion blanket packing the small pebbles. In this study, collapse loads of Li_2Ti0_3 pebbles with different diameters were measured by an unconfined compression tester, and contact strength of these pebbles was evaluated by Hertzian contact theory.