Abstract
Abstract The theoretical objections to glide dislocation nucleation during metallic contact formation (sintering) are discussed, and their limitations at small particle sizes and under certain geometrical conditions are pointed out. A mechanism for contact formation by the direct conversion of surface free energy to glide dislocation strain energy is presented and evaluated with respect to the activation energy for nucleation and the limiting extent of the process for sphere-flat plate contacts. Finally, some diverse experimental observations from the literature are interpreted in terms of the proposed mechanism.
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