Abstract
Keywords: pseudo-alloys, electrical contacts, molybdenum.
The pseudo-alloys W-Cu-Co are use for fabrication of electrical contacts in high voltage and current systems and must comply several conditions: 1.good refractory, low dilatation coefficient, good mechanical resistance and good resistance at electrical discharge. 2.good electrical and thermal conductibility, low electrical resistivity. It will be analyzed the variation of resistivity in volume and the nominal current depending of Mo percentage.