| 摘要 |
PCT No. PCT/DE94/01527 Sec. 371 Date Jun. 21, 1996 Sec. 102(e) Date Jun. 21, 1996 PCT Filed Dec. 22, 1994 PCT Pub. No. WO95/17759 PCT Pub. Date Jun. 29, 1995A sintered contact material comprising silver and nickel is characterized according to the invention in that the mass fraction of nickel is between 5 and 50%, and in that the nickel is present in the silver microstructure with average particle sizes (+E,ovs d+EE ) 1 mu m<+E,ovs d+EE <10 mu m in largely homogeneous dispersion. A suitable method for preparing said sintered contact material is characterized in that, prior to sintering the nickel is introduced, in the way of mechanical alloying, into the silver microstructure, this operation taking place under an air atmosphere. Contact facings manufactured therefrom can be formed as strips or sections by means of extrusion, as individual contact pieces by means of a shaped part technique, and in each case as a two-layer structure. |
