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相关概念视频

X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

3.9K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
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X-ray Crystallography02:18

X-ray Crystallography

24.0K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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相关实验视频

Updated: Jul 27, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.1K

具有不完整的X射线衍射光谱信息的三相材料映射.

Xuyang Chang1, Karine Lavernhe-Taillard1, Stéphane Roux1

  • 1Université Paris-Saclay/CentraleSupélec/ENS Paris-Saclay/CNRS, LMPS - Laboratoire de Mécanique Paris-Saclay, F-91190, Gif-sur-Yvette, France.

Journal of applied crystallography
|June 7, 2023
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的算法,用于在应力下绘制-形状记忆合金中的相位分布. 它揭示了空间不均性和R相和马石变体的缺失衍射数据.

关键词:
在X射线中,X射线的衍射效果是不同的.正确的直角分解.形状记忆合金的合金

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Quantifying X-Ray Fluorescence Data Using MAPS
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Quantifying X-Ray Fluorescence Data Using MAPS

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Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
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Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

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相关实验视频

Last Updated: Jul 27, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.1K
Quantifying X-Ray Fluorescence Data Using MAPS
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Quantifying X-Ray Fluorescence Data Using MAPS

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Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
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科学领域:

  • 材料科学 材料科学 材料科学
  • 晶体学 晶体学是指结晶学.
  • 固体力学 固体力学是什么

背景情况:

  • 同原子-合金表现出由应力诱导的相位转换驱动的形状记忆特性.
  • 在单轴拉力负荷下,这些合金从奥氏体 (A) 转变为体 (R),然后转变为马氏体 (M) 变体.
  • 这种转换导致由于伪弹性的空间不均性,使相位分析复杂化.

研究的目的:

  • 开发一种方法来绘制-合金在拉伸负荷过程中的相位的空间分布.
  • 为了同时确定R相的未知衍射光谱,并量化马氏体剥离.
  • 为了解决当前现场X射线衍射分析的局限性.

主要方法:

  • 在一轴拉伸负荷下,在一个-样本上进行了现场X射线衍射.
  • 开发了一种使用正确直角分解 (POD) 与不平等约束的新算法.
  • 该算法旨在处理衍射数据并解决相位分布和光谱信息.

主要成果:

  • 拟议的算法成功地绘制了奥氏体,R相和马氏体变体的空间分布.
  • 该方法为R相提供了以前未知的衍射光谱信息.
  • 还确定了马氏体开采的程度,提供了对转化过程的全面了解.

结论:

  • 这种基于POD的新算法有效地分析了应力形状记忆合金的现场X射线衍射数据.
  • 这种方法克服了表征相变的局限性,并提供了关键的缺失光谱数据.
  • 该方法为了解-合金在机械负荷下的复杂行为提供了一个强大的工具.