Faculty Profiles - HASEGAWA, Masashi

Papers - HASEGAWA, Masashi

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Analysis of bulk metallic glass formation using a tetrahedron composition diagram that consists of constituent classes based on blocks of elements in the periodic table Reviewed

A. Takeuchi, S. Ranganathan, M. Hasegawa, B.S. Murty and A Inoue

Mater. Trans. Vol. 48 page： 1304-1312 2007

Electronic structure and stability of the Pd-Ni-P bulk metallic glass Reviewed

T. Takeuchi, D. Fukamaki, H. Miyazaki, K. Soda, M. Hasegawa, H. Sato, U. Mizutani, T. Ito, S. Kimura

Mater. Trans. Vol. 48 page： 1292-1298 2007

Mechanical properties and microstructures of composites of Ti-based metallic glass and beta-Ti Reviewed

T. Yamamoto, H. Ito, M. Hasegawa and A. Inoue

Mater. Trans. Vol. 48 page： 1812-1815 2007

Effect of nanocrystal distribution on mechanical properties of ti-based metallic glasses Reviewed

H. Ito, T. Yamamoto, M. Hasegawa and A. Inoue

Mater. Trans. Vol. 48 page： 1755-1758 2007

Pd基金属ガラスの電子構造と相安定性 Reviewed

深牧大介，竹内恒博，曽田一雄，長谷川正，水谷宇一郎，佐藤洋一

粉体および粉末冶金 Vol. 54 page： 754-760 2007

Voronoi analysis of the structure of Ni-Zr-Al ternary metallic glass Reviewed

T. Fukunaga, K. Itoh, T. Otomo, K. Mori, M. Sugiyama, H. Kato, M. Hasegawa, A. Hirata, Y. Hirotsu and A. C. Hannon

Materials Transactions Vol. 48 page： 1698-1702 2007

Preparation and mechanical properties of dispersed-ZrN glassy composite alloys containing pores Reviewed

M. Hasegawa, D. Nagata, T. Wada and A. Inoue

Acta Materialia Vol. 54 page： 3221-3226 2006

Hydrogen-induced internal friction of Ti-rich multicomponent glassy alloys Reviewed

M. Hasegawa, M. Takeuchi, H. Kato, S. Yamaura and A. Inoue

Mater. Sci. Eng. A Vol. 442 page： 106-108 2006

Structure of Cu-Zr and Ni-Zr metallic glasses and RMC modeling Reviewed

T. Fukunaga, K. Itoh, T. Otomo, K. Mori, M. Sugiyama, H. Kato, M. Hasegawa, A. Hirata and Y. Hirotsu

Intermetallics Vol. 14 page： 893-897 2006

Fragility and thermal stability of Pt- and Pd- based bulk glass forming liquids and their correlation with deformability Reviewed

H. Kato, T. Wada, M. Hasegawa, A. Inoue, J. Saida and H. S. Chen

Scripta Materialia Vol. 54 page： 2023-2027 2006

Voronoi analysis of the structure of Cu-Zr and Ni-Zr metallic glasses Reviewed

T. Fukunaga, K. Itoh, T. Otomo, K. Mori, M. Sugiyama, H. Kato, M. Hasegawa, A. Hirata, Y. Hirotsu and A. C. Hannon

Intermetallics Vol. 14 page： 893–897 2006

Internal friction and mechanical strength of hydrogenated Ti-rich multicomponent glassy alloys Reviewed

M. Hasegawa, M. Takeuchi, D. Nagata, T. Wada, H. Kato, Y. Yamaura and A. Inoue

Key Engineering Materials Vol. 3196 page： 139-144 2006

Topological characterization of metallic glasses by neutron diffraction and RMC modeling Reviewed

Toshiharu Fukunaga, Keiji Itoh, Toshiya Otomo, Kazuhiro Mori, Masaaki Sugiyama, Hidemi Kato, Masashi Hasegawa, Akihiko Hirata, Yoshihiko Hirotsu, Kiyoshi Aoki

Physica B Vol. 385–386 page： 259–262 2006

関連結晶相の局所構造解析を利用したZr-Ni-Alバルクアモルファス相の安定性の解明 Reviewed

中野さくら, 竹内恒博, 曽田一雄, 長谷川正, 水谷宇一郎, 佐藤洋一，伊藤恵司，福永俊晴

粉体及び粉末冶金 Vol. 53 page： 100-106 2006

バルク金属ガラスZr-TM-Al (TM = Ni, Cu)の電子構造 Reviewed

鈴木孝治，宮崎秀俊，曽田一雄，竹内恒博，長谷川正，佐藤洋一，水谷宇一郎

粉体及び粉末冶金 Vol. 53 page： 107-110 2006

電力・電気利用のための各種磁性材料における最近の動向 Invited

長谷川正

日本学術振興会材料と微細組織と機能性第１３３委員会第１９０回研究会資料 page： 1-7 2006

Synthesis of Co2N by a simple direct nitriding reaction between nitrogen and cobalt under 10 GPa and 1800 K using diamond anvil cell and YAG laser heating Reviewed

M. Hasegawa and T. Yagi

Solid State Commun. Vol. 135 page： 294-297 2005

Systematic study of formation and crystal structure of 3d-transition-metal nitrides synthesized in a supercritical nitrogen fluid under 10 GPa and 1800 K using diamond anvil cell and YAG laser heating Reviewed

M. Hasegawa and T. Yagi

J. Alloys and Compd. Vol. 403 page： 131-142 2005

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Syntheses of 3d-transition metal (Ti-Cu) nitrides have been tried in a supercritical nitrogen fluid at high pressures (about 10 GPa) and high temperatures (about 1800 K) using diamond anvil cell and YAG laser heating system. Nitrides, such as TiN, VN, CrN, Mn3N2, Fe2N, Co2N and Ni3N have been successfully synthesized easily by a simple direct nitriding reaction between metal and fluid nitrogen in a short time, while any Cu nitrides were not synthesized. These results indicate that the ratio of nitrogen to metal, N/M, of the nitride decreases from 1 to 0 with the sequence from the early transition metal nitrides to the late transition metal ones. The systematic change of the N/M ratio and crystal structure of the 3d-transition metal nitrides is discussed and interpreted on the basis of the electron arrangement of the 3d-transition metal which is relevant to its coordination number.

Effects of Pd addition on stability and hydrogen-induced internal friction of Ti34Zr11Cu47Ni8 glassy alloys Reviewed

M. Hasegawa, M. Takeuchi and A. Inoue

Acta Materialia Vol. 53 page： 5297-5304 2005

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The effects of additions or Pd below 10 at.% on the stability and hydrogen-induced internal friction behavior of Ti34Zr11Cu47Ni8 glassy alloys have been investigated. Thermal analyses indicate that the Supercooled liquid region decreases distinctly with increasing Pd content. It was round that internal friction peak temperatures or Ti(34)Z(11)Cu(47)Ni(8)-Pd hydrogenated glassy alloys (HGAs) in the hydrogen content range below approximately 30 at.% H were higher than those of the original Ti34Zr11Cu47Ni8 FIGAs, especially at hydrogen contents below similar to 10 at.% H. It was also found that the internal friction peaks of Ti34Zr11Cu47Ni8-Pd HGAs increased with increasing hydrogen content below similar to 15 at% H, after which they tended to saturate. These results are in contrast to the effects of Si addition as previously reported. The effects of Pd are discussed from the viewpoint of the interstitial site distribution for hydrogen and local atomic structure of the glassy alloy.

Electronic structure of bulk metallic glass Zr55Al10Cu30Ni5 Reviewed

K. Soda, K. Shimba, S. Yagi, M. Kato, T. Takeuchi, U. Mizutani, T. Zhang, M. Hasegawa, A. Inoue, T. Ito and S. Kimura

J. Electron Spectroscopy Related Phenomena Vol. 144-147 page： 585-587 2005

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Papers - HASEGAWA, Masashi