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Two smooth-to-sharp facet edge transitions have been observed in a Pb-5at%Bi-0.04at%Ni alloy. At 260°C, equilibrated crystallites of the alloy are generally spherical with small facets at {111} and {100} orientations, and the rounded parts of the equilibrium form are smoothly connected to the facets. Upon heating to a temperature 10°C below the solidus (or bulk melting) temperature, the edges of the...
The equilibrium wetting of Pb-rich solid by Ga-rich liquid has been investigated between 560 K and the monotectic temperature (586 K) of the Ga Pb system. The distribution of liquid on the surface of Pb-rich crystals, 10 to 20 μm in size, has been studied. At temperatures below 570 K (i.e. some 16 K or more below the monotectic temperature) the Ga-rich liquid is distributed in droplets in a three-fold...
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