COPPER-BASE SINTERED ELECTROCONTACT MATERIAL Russian patent published in 2003 - IPC

FIELD: powder metallurgy, particularly, copper-base sintered materials for electric contacts applicable in low-voltage electric apparatuses for switching of up to 100-A DC and AC circuits. SUBSTANCE: offered material contains ultradispersed powder of zinc oxide with dispersity of not in excess of 0.006 mcm and aluminum with the following amounts of components, wt.%: ultradispersed powder of zinc oxide 1-5; aluminum 0.001-0.005; the balance, copper. EFFECT: reduced switching wear in prolonged switching with preserved required level of mechanical and service properties. 3 tbl, 1 ex