Abstract
1. The rupture of a hard film on particles of a ductile metal powder during compaction is accomplished in the course of plastic deformation as a result of the spreading of the particle metal, i. e., increase of the particle surface. 2. During the simultaneous plastic deformation of powder particle contact surfaces, symmetrical rupture of the films takes place. 3. At a certain magnitude of plastic deformation, junction bridges separated by film fragments are formed between the particles. The coupling strength is determined by the area of symmetrical cracks. To achieve a strong bond, it is necessary to select a suitable particle shape and the optimum relative film thickness. 4. The results obtained are generally applicable to different ductile metal powders whose particles are coated with hard surface films. The mechanism of rupture of the hard films is identical, and differences may arise only in details and in values of specific pressure. 5. The theory of coupling of metals during simultaneous deformation, as developed in [2, 3, 8], applies to the conditions prevailing during powder compaction.
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