POROUS METAL ARTICLE AND METHOD OF PRODUCING A POROUS METALLIC ARTICLE

摘要

A process for producing a metal article (10) containing at least 10% interconnected porosity (12), using a preform (11), comprising: - mixing an organic binder (26), a wetting agent and a granular material (25), to obtain a mouldable paste (20) that combines 10 vol. pet. or more of said granular material (25), said material dissolving easily in a liquid solvent (24); - shaping the paste into an aerated preform and providing an open pore space (28) to be infiltrated by the metal or alloy; - evaporating said wetting agent and baking said preform to a temperature sufficient to degrade the binder and create a network of interconnected open porosity in the preform (11); filling said open pore space with the liquid metal or alloy (23). All or part of the baked preform can be easily leached by a liquid solvent through the network of fine pores.