Affiliation: | (1) Government Industrial Research Institute, Nagoya, Hirate-cho, Kitaku, 462 Nagoya, Japan;(2) Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Nagatsuta-cho, Midiri-ku, 227 Yokohama, Japan;(3) Present address: Asahi Diamond Co., Kuji, Takatsu-ku, 213 Kawasaki, Japan |