Local atomic structure analysis of Zr-Ni and Zr-Cu metallic glasses using electron diffraction

Akihiko Hirata*, Takuro Morino, Yoshihiko Hirotsu, Keiji Itoh, Toshiharu Fukunaga

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

Local atomic structures in Zr66.7Ni33.3 and Zr 66.7Cu33.3 metallic glasses were examined by using nanobeam electron diffraction (NBED), energy-filtered selected area electron diffraction (SAED) and high-resolution electron microscopy (HREM). Locally ordered regions of atomic medium range order (MRO) were observed in both of the specimens by NBED, although it was difficult to recognize the regions using HREM. Statistical analyses for NBED patterns revealed such a difference in the extended MRO regions between the specimens that the MRO structure in Zr 66.7Ni33.3 is more complex with a large dispersion of interplanar spacings than those in Zr66.7Cu33.3. To understand nearest-neighbor atomic coordination, we performed electron intensity analyses using energy-filtered SAED patterns and constructed structure models including about 5000 atoms with the help of reverse Monte Carlo simulation. The nearest-neighbor atomic environments around Ni atoms in Zr66.7Ni 33.3 are also different from those around Cu atoms in Zr 66.7Cu33.3, consistent with the NBED study. The local structural difference between the two glasses was discussed in relation to their glass-forming abilities.

本文言語English
ページ(範囲)1299-1303
ページ数5
ジャーナルMaterials Transactions
48
6
DOI
出版ステータスPublished - 2007 6月
外部発表はい

ASJC Scopus subject areas

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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