Development of a single-crystal X-ray diffraction system for hydrostatic-pressure and low-temperature structural measurement and its application to the phase study of quasicrystals

Watanuki, Tetsu; Machida, Akihiko; Ikeda, Takashi; Ohmura, Ayako; Kaneko, Hiroshi; Aoki, Katsutoshi; Sato, Taku; Tsai, An‐Pang

doi:10.1080/14786430701358707

Cited by 48 publications

(37 citation statements)

References 13 publications

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“…The pressure in the sample chamber was monitored by measuring the fluorescence spectra [14] from ruby balls pressurized with the sample in the hydrogen medium. X-ray diffraction measurements were conducted at beamline BL22XU, SPring-8 [15,16]. The incident beam, monochromatic X-rays tuned to 25.06 keV (wave length λ = 0.4948Å), was collimated to 20 m × 20 m so that just the sample area was irradiated to obtain a high S/N ratio or high quality diffraction data.…”

Section: Methodsmentioning

confidence: 99%

Pressure-induced structural change from hexagonal to fcc metal lattice in scandium trihydride

Ohmura

Machida

Watanuki

et al. 2007

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Pressure-induced structural change from hexagonal to fcc metal lattice in scandium trihydride

Ohmura

Machida

Watanuki

et al. 2007

Journal of Alloys and Compounds

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“…X-rays of 15 keV (λ = 0.8273 Å) were selected from the synchrotron radiation using a monochromator with double Si(111) crystals, and the samples were radiated through a cross slit of 40 or 60 µm width; a collimator with a diameter of 100 µm was used to remove scattering from the cross slit and air. The XRD patterns were collected using the single-crystal X-ray diffraction system described by Watanuki et al (2007). The soil particles were completely immersed in the collimated X-rays.…”

Section: Methodsmentioning

confidence: 99%

Mineralogical characterization of radioactive particles from Fukushima soil using µ–XRD with synchrotron radiation

Motai

Mukai

Watanuki

et al. 2016

Journal of Mineralogical and Petrological Sciences

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Radioactive particles of around 50 µm size were collected from highly contaminated soil in the Fukushima Prefecture, Japan, and characterized using micro X-ray diffraction with synchrotron radiation (SR-µ-XRD). Two-dimensional diffraction patterns from individual particles rotated during X-ray irradiation were recorded on a flat imaging plate and a one-dimensional diffraction profile, as a function of 2θ, was derived from the pattern. Weathered biotite (WB) particles with plate-like morphology showed a broad peak corresponding to a basal reflection with d = 10-14 Å, indicating various degrees of vermiculitization. Another peak of~7 Å was also detected in these WB particles, suggesting the parallel growth of kaolinite in the biotite particles. These characteristics were also found in the WB collected from an Abukuma granitic body, which is widespread in the eastern part of Fukushima. SR-µ-XRD of radioactive soil particles consisting of fine minerals or of those rich in organic matter indicated that these particles contain very fine 2:1 type clay minerals alongside detrital rockforming minerals such as quartz and feldspar.

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“…Specimens used in this study were as-cast and annealed eutectic Zr 50 Cu 40 Al 10 The X-ray scattering experiments were performed using high energy X-rays of 69.8 keV at BL22XU in SPring-8, Hyogo, Japan [7]. Figure 1a shows the schematic layout of the optical system used in this study.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Elastic Deformation Mechanism in As-Cast and Annealed Eutectic and Hypoeutectic Zr–Cu–Al Metallic Glasses by Multiscale Strain Analysis

Suzuki

Yamada

Tsubaki

et al. 2016

Metals

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Elastic deformation behaviors of as-cast and annealed eutectic and hypoeutectic Zr-Cu-Al bulk metallic glasses (BMG) were investigated on a basis of different strain-scales, determined by X-ray scattering and the strain gauge. The microscopic strains determined by Direct-space method and Reciprocal-space method were compared with the macroscopic strain measured by the strain gauge, and the difference in the deformation mechanism between eutectic and hypoeutectic Zr-Cu-Al BMGs was investigated by their correlation. The eutectic Zr 50 Cu 40 Al 10 BMG obtains more homogeneous microstructure by free-volume annihilation after annealing, improving a resistance to deformation but degrading ductility because of a decrease in the volume fraction of weakly-bonded regions with relatively high mobility. On the other hand, the as-cast hypoeutectic Zr 60 Cu 30 Al 10 BMG originally has homogeneous microstructure but loses its structural and elastic homogeneities because of nanocluster formation after annealing. Such structural changes by annealing might develop unique mechanical properties showing no degradations of ductility and toughness for the structural-relaxed hypoeutectic Zr 60 Cu 30 Al 10 BMGs.

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Development of a single-crystal X-ray diffraction system for hydrostatic-pressure and low-temperature structural measurement and its application to the phase study of quasicrystals

Cited by 48 publications

References 13 publications

Pressure-induced structural change from hexagonal to fcc metal lattice in scandium trihydride

Pressure-induced structural change from hexagonal to fcc metal lattice in scandium trihydride

Mineralogical characterization of radioactive particles from Fukushima soil using µ–XRD with synchrotron radiation

Investigation of Elastic Deformation Mechanism in As-Cast and Annealed Eutectic and Hypoeutectic Zr–Cu–Al Metallic Glasses by Multiscale Strain Analysis

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