Process for producing a solid oxide fuel cell by depositing an electrically conductive and gas permeable layer on a porous support substrate

A process for producing a metal-supported solid oxide fuel cell, the process comprising the following steps:

• providing a porous metallic support substrate formed of sintered grains of a Fe-based alloy, the support substrate having an open-pore structure, being gas permeable and having a density of 40% to 70% of a theoretical density;
• depositing an electrically conductive ceramic diffusion barrier layer directly on the metallic porous support substrate by a pulsed sputtering process retaining the open-pore structure of the substrate and a gas permeability thereof, forming a coated porous metallic support substrate that is gas permeable;
• and
• applying an anode in direct material contact with the coated porous support substrate to produce a support structure with an anode of the metal-supported solid oxide fuel cell.