Three-dimensional imaging of a long-period stacking ordered phase in Mg97Zn1Gd2 using high-voltage electron microscopy

Kazuhisa Sato, Shunya Tashiro, Yohei Yamaguchi, Takanori Kiguchi, Toyohiko J. Konno, Tomokazu Yamamoto, Kazuhiro Yasuda, Syo Matsumura

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Spatial configurations and lateral morphology of the 14H long-period stacking ordered (LPSO) phase have been studied by single tilt-axis electron tomography using high-voltage scanning transmission electron microscopy (STEM) operated at 1 MV. A "Quonset hut-like" lateral shape of the LPSO was found in a tomogram of a specimen as thick as 1.7 μ m. The reconstructed volume reveals spatial distribution of residual particulate precipitates of (Mg, Zn)3Gd phase 20-30 nm in diameters. The precipitates act as a source of solute elements for the formation and growth processes of 14H LPSO. 1 MV-STEM realizes enough resolution for imaging the morphology of LPSO as well as high electron transmittance (∼4.1 μ m) without any obvious electron irradiation damages on microstructures.

Original languageEnglish
Pages (from-to)918-921
Number of pages4
JournalMaterials Transactions
Issue number6
Publication statusPublished - Jan 1 2016


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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