7. Three-dimensional imaging in SAT

The end result of an atom probe analysis is a 3D map of the position of atoms of each species (A, B, C...) within the probed volume.

Tens of millions of atoms can be collected for each analysis. Analyzing the information contained in the data sets is not trivial.

The dataset can be represented using various methods to deduce structural or chemical properties (precipitation, segregation, interdiffusion...) that may influence the material's physical properties.

The simplest way is to represent atoms by a set of colored points defined in 3D. Each point is then an atom with coordinates (x, y, z ). The color-coded chemical nature is deduced from the mass spectrum (figure 8...

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Three-dimensional imaging in SAT

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Metallurgy applications

Bibliography

(1) - BRANDON (D.G.) - On field evaporation. - Philosophical Magazine, 14, p. 803-820 (1966).
(2) - TSONG (T.T.) - Field ion image formation. - Surface Science, 70, p. 211-233 (1978).
(3)...

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