A process for the connection of the pseudo alloy of tungsten - copper with electrolytic copper and application of the method

摘要

W-Cu pseudo-alloys esp. ctg. 60-90% W, are impregnated electrolytically with Cu and A Cu layer of thickness 0.2-0.5 mm deposited. The material is then heated at 1000-1300 degrees C in an inert/reducing atmos esp. 75 vol.% H2 and 25 vol.% N2 or alternatively pure H2, until the black line which forms at the alloy/Cu junction when the m.pt. of Cu is reached, has disappeared. Pref. the material is allowed to cool immersed in alumina which has been pre-heated to 100 C and also in a H2-free atmos. The material is esp. suited for contacts of high voltage electrical appts and has excellent-wear and erosion resistance.