A process is described for the sintering of powders (D) comprising conductive powders, loose or in the form of powder compacts, that comprises the operations of: inserting said powders (D) in a mold (23; 33, 34); applying (5, 6) a pressure (P(t)) to said powders (D) in said mold (23; 33, 34) commanding (4) nominal pressure values to pressure application devices (5, 6) to said powders (D); applying (1, 2, 3, 4) one or more current impulses (Ii) to said powders (D) in said mold (23; 33, 34) for a respective time interval of predetermined duration (tf), wherein said nominal pressure values (P(t)) commanded said pressure application devices (5, 6) defining an increment of pressure (P1) from a first pressure, value (P0) to a second pressure value (Pj) greater | than said first pressure value (P0) and said increment in the pressure (P4) being applied in a synchronized way with respect to the initiation of said time interval of predetermined duration (tf) of the current impulse (Ii)o.