Effect of Edge Dislocations on the Alloying of Indium to Germanium

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Abstract
H. Kettering observed that indium fused to germanium spreads more extensively on material with a low edge‐dislocation density than on high dislocation density material. A detailed study of the alloying mechanism shows that: (1) Edge dislocations and other crystal disturbances enhance the dissolution of germanium in indium. Hence, under equilibrium conditions, deep alloying results with smaller spread of the indium than in the case where the crystal is free from these defects. (2) The recrystallized structure over an edge dislocation differs considerably from the structure at undisturbed sites. (3) The shape of the alloy front is determined by surface tension forces and a tendency to terminate in (111) planes.

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