Composite copper-based material for electric contacts under heavy stress, method of manufacturing this material and electric contacts made therefrom

摘要

Composite copper-based material for electric contacts under heavy stress, containing at least one reinforcing component dispersed in the copper matrix. This reinforcing component comprises one or more oxides which are stable with regard to copper, such as Al2O3 and Y2O3, which preferably form a stiffening dispersion in the copper matrix. The reinforcing component can also comprise short fibres consisting of substances which are stable with regard to copper, such as Al2O3 and SiC. The oxide content lies between 1 % and 10 % by volume; the proportion of the said short fibres lies between 5 % and 25 % by volume.