Local Atomic Structure Analysis of Zr-Ni and Zr-Cu Metallic Glasses Using Electron Diffraction
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- Hirata Akihiko
- Institute of Scientific and Industrial Research, Osaka University
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- Morino Takuro
- Institute of Scientific and Industrial Research, Osaka University
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- Hirotsu Yoshihiko
- Institute of Scientific and Industrial Research, Osaka University
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- Itoh Keiji
- Research Reactor Institute, Kyoto University
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- Fukunaga Toshiharu
- Research Reactor Institute, Kyoto University
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Abstract
Local atomic structures in Zr66.7Ni33.3 and Zr66.7Cu33.3 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 Zr66.7Ni33.3 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 Zr66.7Ni33.3 are also different from those around Cu atoms in Zr66.7Cu33.3, consistent with the NBED study. The local structural difference between the two glasses was discussed in relation to their glass-forming abilities.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 48 (6), 1299-1303, 2007
The Japan Institute of Metals and Materials
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Details
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- CRID
- 1390001204251138432
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- NII Article ID
- 10019486313
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 8742214
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed