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

Maryam Sadeghilaridjani; Kosuke Kato; Takenao Shinohara; Wataru Yashiro; Atsushi Momose; Hidemi Kato

doi:10.1016/j.intermet.2016.09.004

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

Maryam Sadeghilaridjani, Kosuke Kato, Takenao Shinohara, Wataru Yashiro, Atsushi Momose, Hidemi Kato

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Metallic glass (MG) exhibits viscous flow behavior in the supercooled liquid (SCL) state, which is of great advantage for its net-forming process. However, the viscous workability varies strongly with the alloy system and/or composition. In this paper, we demonstrate how MG with less viscous workability such as Gd-based MG can be processed in the SCL region. Based on this understanding, high aspect ratio analyzer gratings of 9 μm pitch and ∼30 μm heights have been fabricated through an imprinting method by allowing crystallization during a rapid heating isochronal imprinting process. The analyzer gratings made of Gd-based MG have brought a breakthrough for advancing neutron phase imaging based on grating interferometer.

Original language	English
Pages (from-to)	55-63
Number of pages	9
Journal	Intermetallics
Volume	78
DOIs	https://doi.org/10.1016/j.intermet.2016.09.004
Publication status	Published - 2016 Nov 1

Keywords

Diffraction/scattering
Glass transition and crystallization
Metallic glasses
Thermal stability
Thermoplastic forming
Viscosity

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10.1016/j.intermet.2016.09.004

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

abstract = "Metallic glass (MG) exhibits viscous flow behavior in the supercooled liquid (SCL) state, which is of great advantage for its net-forming process. However, the viscous workability varies strongly with the alloy system and/or composition. In this paper, we demonstrate how MG with less viscous workability such as Gd-based MG can be processed in the SCL region. Based on this understanding, high aspect ratio analyzer gratings of 9 μm pitch and ∼30 μm heights have been fabricated through an imprinting method by allowing crystallization during a rapid heating isochronal imprinting process. The analyzer gratings made of Gd-based MG have brought a breakthrough for advancing neutron phase imaging based on grating interferometer.",

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author = "Maryam Sadeghilaridjani and Kosuke Kato and Takenao Shinohara and Wataru Yashiro and Atsushi Momose and Hidemi Kato",

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T1 - High aspect ratio grating by isochronal imprinting of less viscous workable Gd-based metallic glass for neutron phase imaging

AU - Sadeghilaridjani, Maryam

AU - Kato, Kosuke

AU - Shinohara, Takenao

AU - Yashiro, Wataru

AU - Momose, Atsushi

AU - Kato, Hidemi

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Metallic glass (MG) exhibits viscous flow behavior in the supercooled liquid (SCL) state, which is of great advantage for its net-forming process. However, the viscous workability varies strongly with the alloy system and/or composition. In this paper, we demonstrate how MG with less viscous workability such as Gd-based MG can be processed in the SCL region. Based on this understanding, high aspect ratio analyzer gratings of 9 μm pitch and ∼30 μm heights have been fabricated through an imprinting method by allowing crystallization during a rapid heating isochronal imprinting process. The analyzer gratings made of Gd-based MG have brought a breakthrough for advancing neutron phase imaging based on grating interferometer.

AB - Metallic glass (MG) exhibits viscous flow behavior in the supercooled liquid (SCL) state, which is of great advantage for its net-forming process. However, the viscous workability varies strongly with the alloy system and/or composition. In this paper, we demonstrate how MG with less viscous workability such as Gd-based MG can be processed in the SCL region. Based on this understanding, high aspect ratio analyzer gratings of 9 μm pitch and ∼30 μm heights have been fabricated through an imprinting method by allowing crystallization during a rapid heating isochronal imprinting process. The analyzer gratings made of Gd-based MG have brought a breakthrough for advancing neutron phase imaging based on grating interferometer.

KW - Diffraction/scattering

KW - Glass transition and crystallization

KW - Metallic glasses

KW - Thermal stability

KW - Thermoplastic forming

KW - Viscosity

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

Abstract

Keywords

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