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Sn-Bi phase diagram
Move the cross-hair (red) across the phase diagram to observe the microstructure at three different magnifications for compositions of 10 wt% Bi, 20 wt% Bi, etc

0 wt%, 0 at% Bi 300 200 100 0 0 20 40 60 80 100 wt% Bi
600 μm across
200 μm across
20 μm across

SEM micrographs of a sample of 100% Sn, 0% Bi
Click on an image to see a larger version in the DoITPoMS Micrograph library