Transmission Electron Microscopy for Precipitate Phases in Rapidly Solidified Mg-2 at%Ce-1 at%Zn and Mg-2 at%Ce Alloys

• Nishijima Masahiko

  Institute for Materials Research, Tohoku University

• Hiraga Kenji

  Institute for Materials Research, Tohoku University

• Yamasaki Michiaki

  Department of Materials Science, Kumamoto University

• Kawamura Yoshihiko

  Department of Materials Science, Kumamoto University

抄録

Precipitate phases in Mg-2 at%Ce-1 at%Zn (Mg₉₇Ce₂Zn₁) and Mg-2 at%Ce (Mg₉₈Ce₂) alloys, prepared by a melt-quenching method, have been examined by high-resolution transmission electron microscopy (HRTEM) and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). A precipitate phase formed at grain boundaries has an ordered structure with a hexagonal unit cell of \\sqrt3a₀ and c₀, in which a₀ and c₀ are lattice parameters of an h.c.p. structure of the Mg-matrix. On the other hand, a precipitate phase embedded in Mg-matrix grains has a long-period modulated structure formed by the appearance of two-dimensional anti-phase boundaries with a hexagonal symmetry in the fundamental hexagonal structure with lattice constants of \\sqrt3a₀ and c₀.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (3), 476-480, 2007

  公益社団法人 日本金属学会

キーワード

• magnesium-cerium
• magnesium-cerium-zinc
• transmission electron microscopy
• rapidly solidified
• precipitate
• crystal structure

詳細情報

• CRID: 1390282679228079744
• NII論文ID: 130004453491
• DOI: 10.2320/matertrans.48.476
• ISSN: 13475320
• ISSN: 13459678
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/3/48_MRA2006331/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可