Patent ID: 8802004

Claim:
A process for producing a component including a porous region and an areal fluid-tight region by powder metallurgy, the process comprising: providing a starting powder which has a sintering activity and which forms at least one of (a) intermetallic phases and (b) solid solutions; sintering a first portion of the starting powder to form the porous region, which is formed from at least one of (a) an intermetallic phase and (b) solid solutions; and sintering a second portion of the starting powder to form the areal fluid-tight region, which is formed from at least one of (a) a metal, (b) a metal alloy, and (c) a corresponding intermetallic phase or solid solution; wherein the first portion of the starting powder has a grain size d 50 <50 μm and wherein the second portion of the starting powder has sintering activity obtained by high-energy milling.