[B-1-7] Drilling performance and behavior of cutting edge shape of diamond-coated carbide drill in drilling of zirconia ceramics 〇Masato Okada1, Fuya Yoshimoto1, Hidehito Watanabe2, Takuya Miura1, Masaaki Otsu1 (1.University of Fukui, 2.UNION TOOL CO.) Keywords:Machining、Diamond-coated carbide drill、Zirconia ceramics、Drilling conditions、Tool wear behavior