Topological characterization of metallic glasses by neutron diffraction and RMC modeling

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

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 148 KB
• Volume: 385-386
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.05.061

✦ Synopsis

TbFe 2 D 3.8 , TbNi 2 D 2.4 , CuZr 2 and NiZr 2 metallic glasses have been studied to elucidate the structural characteristics by taking advantage of neutron and X-ray diffraction and using the reverse Monte Carlo (RMC) modeling based on the diffraction data. Topologically, about 98% of D atoms occupy tetrahedral sites formed by metal atoms for TbFe 2 D 3.8 and TbNi 2 D 2.4 metallic glasses. The Volonoi analysis of the structure of CuZr 2 and NiZr 2 metallic glasses was carried out to elucidate the relationship between the stability of glassy state and the atomic configuration. The prismatic-like polyhedra dominate in NiZr 2 metallic glass. In contrast, the icosahedronlike polyhedra faces are preferred for constructing the structure of CuZr 2 metallic glass.