Visualization of hydrides in titanium by means of diffraction-enhanced X-ray imaging

Mizuno, Kaoru; Kobayashi, T.; Fujiki, F.; Okamoto, Hiroyuki; Furuya, Yoshio; Hirano, Keiichi

doi:10.1016/j.jallcom.2005.04.199

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…shows white and black contrast images and the image is reversed between Fig. 3 (a) and 3 (b) or 3 (c) and 3 (d) similar to previously reported results [10]. Because hydrogen charging of this specimen was carried out at 63 ℃, hydrogen atoms could not diffuse into the crystal so fast on account of the high migration energy of hydrogen (0.49 eV).…”

Section: Resultssupporting

confidence: 85%

“…This technique, refraction contrast X-ray microscopy, has been successfully used and is seeing excellent and rapid progress as a diagnostic tool in medicine, biology and material sciences, because of the application of a highly parallel X-ray beam provided by synchrotron radiation source [7][8][9]. Although the difference in refraction indexes between titanium and titanium-hydride is extremely small, about 10 -8 for 30keV X-ray, we were able to visualize a highcontrast projection image of the hydride using refractioncontrast radiography [10]. Most suitable refraction radiography for material sciences is diffraction-enhanced Xray imaging [DEI] method because it is easy to separate the refraction images and absorption images in an X-ray photograph taken by the imaging method.…”

Section: Introductionmentioning

confidence: 96%

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Distribution of Hydride in Titanium Determined by X-Ray Diffraction-Enhanced Imaging Method with Asymmetric Reflection Analyzer

Mizuno

Kanai

Hirano

et al. 2009

Trans. Mat. Res. Soc. Japan

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The X-ray refraction imaging technique, diffraction-enhanced X-ray imaging (DEI) method with an asymmetric reflection analyzer was applied to determine the distribution profile of hydride in titanium. Horizontal magnification of the image by the asymmetric reflection was 9 times. Hydride was formed on titanium surface by electrolytic-charging at room temperature for 10, 25.5, 48 and 150 h. The specimen was cut into a 1-mm thick slice for cross-sectional observation. Hydride layer was observed by DEI method as a thick black or white line parallel to the surface. X-ray intensity profile of hydride was measured from the DEI image and converted to the deviation angle of X-ray by refraction using the observed rocking curve. The distribution of refraction index was calculated from the deviation angle of X-ray using Snell's low. Finally distribution of ratio of hydride and titanium, the concentration profile of hydride, was obtained from that of the refraction index. The distribution profile of hydride in titanium was determined to accuracy of the order of micrometer by means of the DEI method with asymmetric reflection analyzer.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 96%

Distribution of Hydride in Titanium Determined by X-Ray Diffraction-Enhanced Imaging Method with Asymmetric Reflection Analyzer

Mizuno

Kanai

Hirano

et al. 2009

Trans. Mat. Res. Soc. Japan

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“…In the field of material science, Mizuno et al applied the DEI method to obtain high-contrast images to observe hydrides in titanium, which was invisible in conventional X-ray absorption imaging in 2005 [121]. In 2007, the same authors applied the DEI method to a quantitative study of hydrogen diffusion in titanium-hydride.…”

Section: Diffraction-enhanced Imaging (Dei)mentioning

confidence: 99%

Principles of Different X-ray Phase-Contrast Imaging: A Review

Tao

Hao

et al. 2021

Applied Sciences

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Numerous advances have been made in X-ray technology in recent years. X-ray imaging plays an important role in the nondestructive exploration of the internal structures of objects. However, the contrast of X-ray absorption images remains low, especially for materials with low atomic numbers, such as biological samples. X-ray phase-contrast images have an intrinsically higher contrast than absorption images. In this review, the principles, milestones, and recent progress of X-ray phase-contrast imaging methods are demonstrated. In addition, prospective applications are presented.

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“…This technique, refraction contrast X-ray microscopy, has been successfully used and is seeing excellent and rapid progress as a diagnostic tool in medicine, biology and material sciences, because of the application of a highly parallel X-ray beam provided by synchrotron radiation source [6][7][8]. Although the difference in refraction indexes between titanium and titanium-hydride is extremely small, about 10• 8 for 30keV X-ray, we were able to visualize a highcontrast projection image of the hydride using refractioncontrast radiography [9]. Most suitable refraction radiography for material sciences is diffraction-enhanced Xray imaging method because it is easy to separate the refraction images and absorption images in an X-ray photograph taken by the imaging method.…”

Section: Introductionmentioning

confidence: 95%

New determination method of hydrogen diffusivity in titanium-hydrides by means of diffraction-enhanced X-ray imaging method

Mizuno¹,

Furuya²,

Hirano³

et al. 2007

Trans. Mat. Res. Soc. Japan

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The X-ray refraction imaging technique, diffraction-enhanced X-ray imaging (DEI) method was applied to determine the .hydrogen diffusivity in titanium-hydride. Hydride was formed on titanium surface by electrolytic-charging at room temperature for 6, 12, 18, 24 and 48 h. The specimen was cut into a 1-mm thick slice for cross-sectional observation. Hydride layer was observed by DEI method as a thick black or white line parallel to the surface. Hydride distribution caused by hydrogen diffusion from the surface was calculated using assumed hydrogen diffusivity and a solution of diffusion equation. And the results were converted to the intensity profile of refraction images of the hydride using the measured rocking curve from an analyzer. The intensity profile was compared with that obtained from the photographs and fitted diffusivity was decided by trial and error. The obtained diffusion coefficient of hydrogen in titanium-hydride, 3.6 x 1 0' 15 m' 2 /s, was slightly larger than the value obtained by internal friction at room temperature.

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Visualization of hydrides in titanium by means of diffraction-enhanced X-ray imaging

Cited by 6 publications

References 7 publications

Distribution of Hydride in Titanium Determined by X-Ray Diffraction-Enhanced Imaging Method with Asymmetric Reflection Analyzer

Distribution of Hydride in Titanium Determined by X-Ray Diffraction-Enhanced Imaging Method with Asymmetric Reflection Analyzer

Principles of Different X-ray Phase-Contrast Imaging: A Review

New determination method of hydrogen diffusivity in titanium-hydrides by means of diffraction-enhanced X-ray imaging method

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