Local structural fluctuation in Pd-Ni-P bulk metallic glasses examined using nanobeam electron diffraction

Akihiko Hirata, Yoshihiko Hirotsu*, Satoru Kuboya, T. G. Nieh

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

Local structural fluctuation in relation to the medium range order (MRO) in a Pd-Ni-P bulk metallic glass was examined using nanobeam electron diffraction (NBED) technique. We found diffraction spots with strong intensities in the NBED patterns taken from any observation sites in the specimen. This indicates a presence of MRO regions densely formed in the specimen. The diffraction spots in NBED were normally dispersed around positions corresponding to the first halo-diffraction ring in selected area diffraction. A low-temperature annealing led to form a nanocrystalline microstructure consisting of unidentified phosphides. In the course of annealing, the MRO structures deduced from the NBED patterns have no structural similarity to the phosphides found in the primary crystallization stage. The MRO structure changes into a similar structure with the primary crystals just before the crystallization. A discussion is made for the MRO structure and its relation to the glass stability and also to the phosphide nucleation in the primary crystallization.

本文言語English
ページ(範囲)64-69
ページ数6
ジャーナルJournal of Alloys and Compounds
483
1-2
DOI
出版ステータスPublished - 2009 8月 26
外部発表はい

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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