Publication

Recent EDS instrumental advances in STEM: from principles to applications

Philippe Buffat
2013
Journal Articles

Abstract

The electron microscopy community makes a wide use of Energy Dispersive X-ray Spectrometry (EDS) for elemental mapping in STEM. This technique was however long reckoned slow, dozens of minutes if not an hour, to collect enough information for one map. Recent instrumental advances have dramatically changed the situation, reducing the acquisition time to minutes, improving the maps quality and boosting their spatial resolution beyond the nanometer scale or even down to the single atom column in crystalline materials. Application examples to Nb-Sn superconductors and Ni-base superalloys

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https://infoscience.epfl.ch/entities/publication/6eece046-2df3-4599-9802-3103e7dfce87

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Philippe Buffat
2013
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6eece046-2df3-4599-9802-3103e7dfce87

About this result

Related concepts (32)

Crystallinity

Crystallinity refers to the degree of structural order in a solid. In a crystal, the atoms or molecules are arranged in a regular, periodic manner. The degree of crystallinity has a big influence on hardness, density, transparency and diffusion. In an ideal gas, the relative positions of the atoms or molecules are completely random. Amorphous materials, such as liquids and glasses, represent an intermediate case, having order over short distances (a few atomic or molecular spacings) but not over longer distances.

X-ray spectroscopy

X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation. When an electron from the inner shell of an atom is excited by the energy of a photon, it moves to a higher energy level. When it returns to the low energy level, the energy which it previously gained by the excitation is emitted as a photon which has a wavelength that is characteristic for the element (there could be several characteristic wavelengths per element).

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

Related publications (32)

Recent EDS instrumental advances in STEM: from principles to applications

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