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相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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相关实验视频

Updated: Jun 22, 2025

Atom Probe Tomography Analysis of Exsolved Mineral Phases
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使用原子探头断层扫描量化短距离顺序.

Mengwei He1, William J Davids1, Andrew J Breen1

  • 1Australian Centre for Microscopy and Microanalysis, and School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales, Australia.

Nature materials
|July 2, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的原子探头断层扫描方法,用于测量中高合金中的短距离顺序 (SRO). 该技术量化了热处理期间的SRO变化,有助于合金设计.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 金工业是金工业的一个方面.
  • 计算材料科学科学 计算材料科学

背景情况:

  • 中高合金提供了特殊的强度和柔性.
  • 短距离顺序 (SRO) 可以通过计算预测,但很难通过实验来测量.
  • 量化SRO对于了解其对合金性质的影响至关重要.

研究的目的:

  • 开发一种可靠的方法来使用原子探头断层扫描测量合金中的SRO.
  • 研究热处理对CoCrNi合金中的SRO的影响.
  • 为了实现SRO效应的精确计算建模.

主要方法:

  • 利用原子探头断层扫描 (APT) 来量化特定物种的SRO.
  • 开发了一种方法来平衡APT限制与SRO值.
  • 将该方法应用于经过各种热处理的CoCrNi合金.

主要成果:

  • 在CoCrNi.Ni中成功测量了热处理引起的SRO变化.
  • 在APT中保存原子邻里信息的既定制度.
  • 为验证计算模型生成实验性SRO数据.

结论:

  • 开发的APT方法提供了一种可靠的方法来测量SRO.
  • 精确的SRO量化有助于我们更好地了解合金的行为.
  • 这种方法有助于设计先进的中高合金.