K
Kenji Hiraga
Researcher at Tohoku University
Publications - 390
Citations - 11160
Kenji Hiraga is an academic researcher from Tohoku University. The author has contributed to research in topics: Quasicrystal & Crystal structure. The author has an hindex of 47, co-authored 390 publications receiving 10598 citations.
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Journal ArticleDOI
The crystal structure of (C0.4Cu0.6)Sr2(Y0.86Sr0.14)Cu2O7
Yuzuru Miyazaki,Hisanori Yamane,N. Ohnishi,Tsuyoshi Kajitani,Kenji Hiraga,Yukio Morii,Satoru Funahashi,Toshio Hirai +7 more
TL;DR: The crystal structure of a new compound, (C0.4Cu0.6)Sr2(Y0.86Sr0.14)Cu2O7, is derived from the structure of YBa2Cu3O7.
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Characterization of β' Precipitate Phase in Mg-2 at%Y Alloy Aged to Peak Hardness Condition by High-Angle Annular Detector Dark-Field Scanning Transmission Electron Microscopy (HAADF-STEM)
TL;DR: In this article, the β' phase precipitated in an Mg-2 at%Y (Mg 98 Y 2 ) alloy aged to a peak hardness condition at 200°C for 336 h has been studied by high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM).
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Al-Cu-Ru: An icosahedral alloy without phason disorder
C. A. Guryan,A. I. Goldman,P. W. Stephens,Kenji Hiraga,An Pang Tsai,Akihisa Inoue,Takeshi Masumoto +6 more
TL;DR: High-resolution x-ray diffraction mesaurements of the recently discovered face-centered icosahedral phase of Al/sub 65/Cu/sub 20/Ru/sub 15 shows that this alloy is better ordered than the simple-icosahedral alloys previously studied, implying a significantly diminished role for phason disorder in this system.
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Structure and Structural Change of Al–Ni–Co Decagonal Quasicrystal by High-Resolution Electron Microscopy
TL;DR: An Al 70 Ni 15 Co 15, alloy, known to form a stable decagonal quasicrystal, was subjected to various heat treatments and studied with electron diffraction and high-resolution electron microscopy as mentioned in this paper.
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New deformation twinning mode of B19′ martensite in Ti-Ni shape memory alloy
TL;DR: In this article, the deformation twinning mode of the B19 prime martensite in Ti-50.0 at%Ni alloy was investigated in the second and third stages of tensile deformation.