Grating patterns with high aspect ratios created on the surface of Pd-based metallic glass by thermal imprinting

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-04-02 DOI:10.1016/j.jallcom.2025.180001

Rui Yamada, Ninshu Ma, Hidemi Kato

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Abstract

The thermal imprinting of grating patterns (lines and spaces) with high aspect ratios (height-to-width ratio of the lines) on the surface of Pd42.5Cu30Ni7.5P20 metallic glass was investigated. The flow model suggested that sample’s temperature of 350 ℃ under the processing time just within the incubation time for crystallization will lead the fabrication of grating with the highest aspect ratio. The load-time curve obtained during imprinting showed that a significant decrease in the load originated from a decrease in the sample viscosity above the glass transition temperature. By minimizing the decrease in loading, a grating with a height of 37 ± 4.1 μm and a fully amorphous structure was produced. Among the metallic glass gratings for X-ray phase imaging, the grating fabricated in this study shows high aspect ratio of ~8.7. As a demonstration, the grating performance was investigated by constructing a simple diffraction apparatus, revealing that the positions of the experimentally observed diffraction spots were consistent with the calculated ones. The results suggested that it can be considered as potential for the grating of X-ray Talbot interferometer.

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研究了在 Pd42.5Cu30Ni7.5P20 金属玻璃表面热压印高宽比（线条的高宽比）的光栅图案（线条和空间）。流动模型表明，样品温度为 350 ℃，加工时间刚好在结晶孵化时间内，可制造出最高纵横比的光栅。压印过程中获得的载荷-时间曲线显示，载荷的显著降低源于样品粘度在玻璃化转变温度以上的降低。通过最大限度地减小载荷，制备出了高度为 37 ± 4.1 μm、完全非晶结构的光栅。在用于 X 射线相位成像的金属玻璃光栅中，本研究中制作的光栅具有约 8.7 的高宽比。实验结果表明，实验观测到的衍射光斑位置与计算结果一致。结果表明，该光栅有可能成为 X 射线塔尔博特干涉仪的光栅。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.