3. Atomic diffusion
The laws and mechanisms of diffusion are discussed in greater detail in the article Diffusion in metals. . In what follows, we will focus on the physical and microscopic origins of diffusion phenomena, drawing on the data in the previous paragraphs.
3.1 General
If a solid solution A1 – cBc, separated by a surface into two areas of different concentrations, is heated for a sufficiently long time, progressive homogenization is observed: c decreases in the initially B-rich area and increases in the A-rich area. Some A and B atoms have therefore crossed the
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Atomic diffusion
Transformations with phase change
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