PRODUCTION OF COMPOSITE ELECTRICAL CONTACT MATERIAL OF SILVER-OXIDE

摘要

PURPOSE:To improve joint strength remarkably and to prevent the peeling of a contact material during use thoroughly by immersing an electrical contact material consisting of a silver-oxide alloy in an NH4Cl soln. then joining the same to a backing material. CONSTITUTION:An electrical contact material consisting of a silver-oxide alloy is immersed in a 1-25vol% NH4Cl soln. to dissolve away the oxide and impurity on the outside surface. Since a silver rich surface is formed on the contact material by the above-mentioned immersion, the contact material is joined to the backing material through the silver rich surface if the said material is joined to the backing material. The joint strength thereof is thus improved remarkably.