Particle contacts in a porous fibrous copper material at early sintering stages

Electrical conductivity measurements have been used in quantitative state evaluation for particle contacts in fibrous copper pressings at early stages of sintering under vacuum. The results agree with ultrasonic data and stretching tests. Contact formation in such a material begins after the specimen has been heated to 600–800°C, i.e., after the complete relaxation of the residual stresses accumulated in the pressure working.