Temperature effect of shock pressure in a vacuum for physical and mechanical properties of Cu—Cr composites

   

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electrical Contacts and Electrodes - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2014, #12
http://www.materials.kiev.ua/article/1135

Abstract

The effect of temperature shock pressure in a vacuum for microstructure, electrical resistance and mechanical properties of composites Cu—30Cr Cu—50 Cr (% wt.) are studied. It is shown that the technique of hot shock pressing of copper and chromium powder mixture, obtained in new type mill (development by Frantsevich Institute for Problems of Materials Science of NASU), allowed to achieve in one process cycle density of 98—99% of theory., hardness — 145—155 HV/10 by Vickers, mechanical tensile strength 350—450 MPa. These values exceed the level of properties for analogies compositions, which is used in industrial vacuum contacts. Full text download


CU–CR COMPOSITES, ELECTRICAL RESISTANCE, IMPACT PRESSING, MECHANICAL CHARACTERISTICS