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Structure, composition and properties of lithium ceramic Li$$_{2}$$TiO$$_{3}$$+5% mole TiO$$_{2}$$ irradiated in WWR-K reactor for solid ceramic blanket of fusion reactor

核融合炉用固体増殖ブランケット開発のためのWWR-K炉で照射した5%TiO$$_{2}$$添加Li$$_{2}$$TiO$$_{3}$$セラミックスの結晶構造と特性

Tazhibayeva, I. L.*; Kulsartov, T.*; Kenzhin, E. A.*; Maksimkin, O. P.*; Doronina, T. A.*; Silnyagina, N. S.*; Turubarova, L. G.*; Tsai, K. V.*; Zheltov, D. A.*; Kashirskiy, V. V.*; Chikhray, E. V.*; Shestakov, V. P.*; Kuykabaeva, A. A.*; 河村 弘; 土谷 邦彦

Tazhibayeva, I. L.*; Kulsartov, T.*; Kenzhin, E. A.*; Maksimkin, O. P.*; Doronina, T. A.*; Silnyagina, N. S.*; Turubarova, L. G.*; Tsai, K. V.*; Zheltov, D. A.*; Kashirskiy, V. V.*; Chikhray, E. V.*; Shestakov, V. P.*; Kuykabaeva, A. A.*; Kawamura, Hiroshi; Tsuchiya, Kunihiko

本論文は、WWR-K炉で照射した核融合炉用セラミックトリチウム増殖材(5%TiO$$_{2}$$添加Li$$_{2}$$TiO$$_{3}$$)の材料研究の結果と解析について記述されている。WWR-K炉におけるこのセラミックスの照射時間は5,350時間であり、中性子照射により生成するトリチウムの特性を制御した照射条件にて調べた。密度,結晶構造,化学的構造,強度及び微小硬さの変化が研究され、リチウム燃焼度や残留トリチウム量が決定された。また、セラミック試料の構造や特性に関する照射や熱が重大な影響を及ぼすことが観測された。すなわち、照射温度によるセラミックス試料の軟化や照射による試料の化学的特性変化を明らかにした。

The paper contains and analyzes the results of integrated material studies of lithium ceramic Li$$_{2}$$TiO$$_{3}$$ + 5% mole TiO$$_{2}$$ irradiated in reactor WWR-K during 5,350 hours under controlled conditions taking into account effects of tritium generated in the course of irradiation. The changes in density, microstructure, phase and chemical composition, strength and microhardness were studies; lithium burn-up level and tritium residual content were defined. The significant influence of radiation-thermal impacts on structure and properties of ceramic samples were observed. It was shown that irradiation resulted in lithium ceramics softening, at that this effect depended on irradiation temperature. It was discovered the radiation change of phase composition of lithium ceramic.

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