The invention mainly concerns a method for preparing metal-matrix composites including at least steps of cold-process isostatic compaction of previously mixed powders (5) and of hot-process uniaxial pressing of the compact (12) resulting from the previous step. The inventive method enables metal-matrix composites with improved properties to be obtained. The invention also concerns a device for implementing in particular the isostatic compaction step comprising a latex sheath (1) wherein the mixture of powders (5) is poured, a perforated cylindrical container (2) wherein is arranged the latex sheath (1), and means (7, 10, 11) for sealed insulation of the mixture of powders (2) contained in the sheath (1). 39 RUE DES FORGES, F-52310 BOLOGNE France FORGES DE BOLOGNE 3617/KOLNP/2007 A 3617/KOLNP/2007 INDIA 2009-03-19T21:40:36Z 2008-05-30 2007-09-25 264439 2006-03-14 PCT/FR2006/000564 B22F 3/04, C22C 1/10 WO 2006/097622 TSCHOFEN JACQUES 7545 23 12 0 107 France 2005-03-14 0502481 2008-05-30 0 2zE7jPgg 2009-04-30T18:30:52Z 25104 TSCHOFEN JACQUES 25103 FORGES DE BOLOGNE 36147 /app_images/9/9/1/9/b7R612.jpg