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Masataka SUGIMOTO
Department of Materials Science and Engineering, Yamagata University, Jonan 4–3–16, Yonezawa, 992 Japan
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Yuichi MASUBUCHI
Department of Materials Science and Engineering, Yamagata University, Jonan 4–3–16, Yonezawa, 992 Japan
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Jun–ichi TAKIMOTO
Department of Materials Science and Engineering, Yamagata University, Jonan 4–3–16, Yonezawa, 992 Japan
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Kiyohito KOYAMA
Department of Materials Science and Engineering, Yamagata University, Jonan 4–3–16, Yonezawa, 992 Japan
