High aspect ratio grating by isochronal imprinting of less viscous workable Gd-based metallic glass for neutron phase imaging

Sadeghilaridjani, Maryam; Kato, Kosuke; Shinohara, T.; Yashiro, Wataru; Momose, Atsushi; Kato, Hidemi

doi:10.1016/j.intermet.2016.09.004

Cited by 14 publications

(9 citation statements)

References 18 publications

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“…Bulk metallic glasses are a new type of metallic materials which have attracted considerable attention over the past decades in the field of structural applications due to their outstanding mechanical properties such as high strength, large elastic limit, excellent irradiation, wear and corrosion resistance in the glassy state and thermoplastic forming ability in the supercooled liquid state [386,387]. However, they have a limited industrial application owing to the insufficient dimensions and geometries achievable using current manufacturing techniques.…”

Section: Bulk Metallic Glasses (Bmgs)mentioning

confidence: 99%

Review of Powder Bed Fusion Additive Manufacturing for Metals

Ladani

Sadeghilaridjani

2021

Metals

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Additive manufacturing (AM) as a disruptive technology has received much attention in recent years. In practice, however, much effort is focused on the AM of polymers. It is comparatively more expensive and more challenging to additively manufacture metallic parts due to their high temperature, the cost of producing powders, and capital outlays for metal additive manufacturing equipment. The main technology currently used by numerous companies in the aerospace and biomedical sectors to fabricate metallic parts is powder bed technology, in which either electron or laser beams are used to melt and fuse the powder particles line by line to make a three-dimensional part. Since this technology is new and also sought by manufacturers, many scientific questions have arisen that need to be answered. This manuscript gives an introduction to the technology and common materials and applications. Furthermore, the microstructure and quality of parts made using powder bed technology for several materials that are commonly fabricated using this technology are reviewed and the effects of several process parameters investigated in the literature are examined. New advances in fabricating highly conductive metals such as copper and aluminum are discussed and potential for future improvements is explored.

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Section: Bulk Metallic Glasses (Bmgs)mentioning

confidence: 99%

Review of Powder Bed Fusion Additive Manufacturing for Metals

Ladani

Sadeghilaridjani

2021

Metals

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“…At BL22 RADEN [85] in J-PARC MLF, Japan, we have developed a Talbot-Lau interferometer to study energy resolved neutron phase imaging by the time-of-flight (TOF) method [86]. To fabricate high-aspect ratio Gd gratings for G2, we studied two approaches: Metallic-glass imprinting [87] and improved inclined Gd evaporation [88,89].…”

Section: Neutron-grating Fabricationmentioning

confidence: 99%

“…While isothermal conditions for the impinging procedure were not successful in filling the metallic glass into the Si grating fully because of the collapse of the Si grating pattern, isochronal conditions via the crystal phase were found to be effective. As a result, gratings of Gd 60 Cu 25 Al 15 and Gd 60 Cu 25 Al 13 B 2 with a depth of ca 30 µm and a period of 9 µm were fabricated [87]. The Talbot-Lau interferometer with the Gd-based metallic-glass grating functioned at J-PARC [91].…”

Section: Gd-based Metallic-glass Imprintingmentioning

confidence: 99%

Recent Progress in X-ray and Neutron Phase Imaging with Gratings

Momose

Takano

et al. 2020

QuBS

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Under the JST-ERATO project in progress to develop X-ray and neutron phase-imaging methods together, recent achievements have been selected and reviewed after describing the merit and the principle of the phase imaging method. For X-ray phase imaging, recent developments of four-dimensional phase tomography and phase microscopy at SPring-8, Japan are mainly presented. For neutron phase imaging, an approach in combination with the time-of-flight method developed at J-PARC, Japan is described with the description of new Gd grating fabrication.

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“…Recently, high-throughput techniques such as microcasting 46,47,51,55,56) and metallic glass imprinting 48,52,53) were proposed. Although they are low-cost and the imprinting technique can also be used even for neutron absorption grating, 58,59) specific materials, in which atomic density of heavy atoms are not necessarily high, are required.…”

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confidence: 99%

Fabrication of X-ray absorption grating using an ultracentrifuge machine

Hojo

Kamezawa

Hyodo

et al. 2019

Jpn. J. Appl. Phys.

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We propose a novel approach to fabricate hard-X-ray optics using an ultracentrifuge machine. As a demonstration, we fabricated an X-ray absorption grating made of gold with a pitch of 30 μm and an effective depth of 44 μm in 67 μm depth grooves [a filling rate of 65%, as same as the filling rate of random packing for equal-sized spheres in a jammed state (64%)]. Our approach is cost-efficient and has a high production-rate and material-selectivity, and will be widely used for fabricating optics not only for X-rays but also neutrons in the near future.

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High aspect ratio grating by isochronal imprinting of less viscous workable Gd-based metallic glass for neutron phase imaging

Cited by 14 publications

References 18 publications

Review of Powder Bed Fusion Additive Manufacturing for Metals

Review of Powder Bed Fusion Additive Manufacturing for Metals

Recent Progress in X-ray and Neutron Phase Imaging with Gratings

Fabrication of X-ray absorption grating using an ultracentrifuge machine

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