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 journalArticlepeer-review

5 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 languageEnglish
Pages (from-to)55-63
Number of pages9
JournalIntermetallics
Volume78
DOIs
Publication statusPublished - 2016 Nov 1

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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