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High power millimeter and submillimeter wave material processing

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光藤 誠太郎*; 星月 久昇*; 松浦 和成*; 佐治 他三郎*; 出原 敏孝*; Glyavin, M.*; Eremeev, A.*; Zapevalov, V.*; 北野 彰洋 ; 西 裕士; 石橋 淳一

Mitsudo, Seitaro*; Hoshizuki, Hisanori*; Matsuura, Kazunari*; Saji, T.*; Idehara, Toshitaka*; Glyavin, M.*; Eremeev, A.*; Zapevalov, V.*; Kitano, Akihiro; Nishi, Hiroshi; Ishibashi, Junichi

24GHzのマイクロ波を使用したB4Cセラミックの焼結方法について、焼結実験を行った。焼結実験では、アルゴンガスを試料周辺に流し、余分なマイクロ波吸収の影響を排除した。実験では、2000$$^{circ}C$$までの焼結を行い、収縮と粒成長が観察された。また、SEM観察では表面に割れが見られた。

Boron carbide (B$$_{4}$$C) is one of advanced materials and is being used in a wide rage of applications. The unique feature of this material is its large neutron-absorbing cross-section. Some of its most prominent applications are controlling rods in nuclear reactors and radiation protection. 24 GHz microwave processing for B$$_{4}$$C ceramics were performed under flowing argon gas using the sintering system. The sintered samples were characterized by the density, the shrinkage and SEM micrographs of fracture surface. Above the temperature of 2000$$^{circ}$$C, the shrinkage and the grain grows were observed.

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