Tag Archives: The Giant’s Shoulders

Classics in Materials Science: Shockley and Read’s dislocation models of crystal grain boundaries

Any crystalline material contains many defects. Depending on the topology of the defects, they can be classified as point, line, surface and volume defects. Of these, only point defects are equilibrium defects — that is, at any temperature above absolute … Continue reading

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Classics in Materials Science: Potts model and its relevance to simulation of microstructures

A soap bubble is an extraordinarily beautiful thing and yet it requires virtually no skill to produce. This is because surface tension does all the work for you, making sure that a perfect spherical membrane is produced every time. In … Continue reading

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Classics in materials science: Vegard’s law of linear relationship between lattice parameter and alloy composition

Let us consider a pure metal, say copper; let us consider the case in which we remove some copper atoms and substitute for them with gold atoms; since gold atoms are slightly bigger than copper atoms, it is natural to … Continue reading

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Classics in Materials Science: The Bragg-Williams model of order-disorder transformations. II

Since Bragg and Williams (BW) wrote a series [1-3], I guess it is only fitting that my post on their classic should also be a series. So, here is the second part. After the first post, Abi made an astute … Continue reading

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Classics in Materials Science: The Bragg-Williams model of order-disorder transformations

The atomic arrangement in a crystal can be understood in terms of unit cells; for example, let us consider the metal copper; the arrangement of atoms in the copper crystal can be described using the face centred cubic (fcc) unit … Continue reading

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Classics in Materials Science: Heycock and Neville’s determination of Cu-Sn (bronze) phase diagram

Bronze is an important alloy. It is so important in the histories of our civilizations that one of the prehistoric ages is named after it: The Bronze Age is, with respect to a given prehistoric society, the period in that … Continue reading

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