Global Patent Index - EP 1140397 B1

EP 1140397 B1 20030102 - PROCESS FOR THE PRODUCTION OF TUNGSTEN-COPPER COMPOSITE SINTERABLE POWDERS

Title (en)

PROCESS FOR THE PRODUCTION OF TUNGSTEN-COPPER COMPOSITE SINTERABLE POWDERS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON SINTERFÄHIGEN METALLPULVERN AUS WOLFRAM UND KUPFER

Title (fr)

PROCEDE DE PRODUCTION DE POUDRES COMPOSITES TUNGSTENE-CUIVRE FRITTABLES

Publication

EP 1140397 B1 20030102 (EN)

Application

EP 99954333 A 19991012

Priority

  • IT 9900321 W 19991012
  • IT RM980776 A 19981216

Abstract (en)

[origin: WO0035616A1] Method for the production of a composite powder consisting of finely interspersed tungsten and copper, which powder can be directly pressed and sintered to provide products having density values exceeding 96 % with respect to the theoretical one and high values for electrical and thermal conductivity, the method essentially comprising the reduction of a copper precursor in the presence of tungsten metal suspended in an organic liquid phase produced by one or a mixture of polyols. The reaction is carried out by heating the suspension to a temperature of at least 60 DEG C and keeping it at a such temperature for a sufficient time to bring about the reduction of the copper precursor by means of the organic phase and tungsten therein.

IPC 1-7

B22F 9/24; B22F 1/00; C22C 1/04

IPC 8 full level

B22F 1/02 (2006.01); B22F 9/24 (2006.01); C22C 1/04 (2006.01); H01H 1/021 (2006.01)

CPC (source: EP)

B22F 1/025 (2013.01); B22F 9/24 (2013.01); C22C 1/045 (2013.01); H01H 1/021 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 0035616 A1 20000622; AT 230321 T 20030115; AU 1073800 A 20000703; CZ 20012180 A3 20020313; DE 69904757 D1 20030206; EP 1140397 A1 20011010; EP 1140397 B1 20030102; IT 1302926 B1 20001010; IT RM980776 A1 20000617

DOCDB simple family (application)

IT 9900321 W 19991012; AT 99954333 T 19991012; AU 1073800 A 19991012; CZ 20012180 A 19991012; DE 69904757 T 19991012; EP 99954333 A 19991012; IT RM980776 A 19981216