Patent ID: 8151860
Filing Date: 2012-04-10
Classification: B22C,B22D,B22F,C22C,Y10T

Abstract:
1. A process for producing a metal or alloy article containing at least 10% interconnected porosity, using a preform, the process comprising: mixing an organic binder, a wetting agent and a granular material, to obtain a mouldable paste that combines 10 vol. pct. or more of said granular material with respect to the total volume of the mouldable paste, said granular material being soluble in a liquid solvent, and said organic binder being thermo-degradable; shaping the mouldable paste into an aerated preform and providing an open pore space to be infiltrated by the metal or alloy; evaporating said wetting agent; baking said preform to a temperature sufficient to degrade the organic binder and create a network of interconnected open porosity in the preform; filling said open pore space with a liquid metal or a metal alloy.