INVESTIGATION OF PRESSING DIAGRAMS DURING MOLDING A MIXTURE OF COPPER POWDERS AND SILICON CARBIDE

Abstract

A study of a mixture of copper and silicon carbide powders after one-sided cold forming in a closed mold was carried out by the next methods: scanning electron microscopy, hydrostatic weighing and analysis of pressing diagrams. The main stages of molding, their boundaries and characteristic processes occurring at each of them are identified. It was found that at least three areas can be distinguished in the molding diagram. It is shown that their boundaries (in terms of pressure) are determined by the mechanical properties of the materials of the used powders and the processes of redistribution / packing of structural elements and their elastic / inelastic deformation.

Keywords

• copper
• silicon carbide
• pressing diagram
• density
• ultimate pressure
• particle shape
• forming mechanism