1. Department of Metallurgy and
Ceramics Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
2. Department of Mechanical Engineering, Gifu National College of Technology, 2236-2 Kamimakuwa,
Motosu, Gifu 501-0495, Japan
3. Department of Materials Science
and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-chyo, Nagaoka, Niigata 940-2188, Japan