Use of a deformable interface for the fabrication of complex parts

A method for fabricating at least one part of a shape, wherein the method comprises:

• introducing powder into a mold,
• forming an imprint on said powder with a counter-form to form a sacrificial counter-form having an internal cavity constituted by said imprint,
• after forming the imprint, depositing at least one layer of a material on a surface of said imprint to form at least one deformable interface layer having an initial geometrical shape,
• after depositing the at least one layer of material, introducing powder on a surface of said at least one deformable interface layer into said internal cavity to form a volume to shape the at least one part of the shape,
• densifying under load along at least one direction of compression an assembly comprising said sacrificial counter-form, said at least one deformable interface layer and said volume, wherein said volume has variations of thickness along said direction of compression, wherein said at least one deformable interface layer separates said volume from at least one face of said sacrificial counter-form, and wherein said at least one deformable interface layer is deformed to adopt a final geometrical shape distinct from said initial geometrical shape, and
• extracting said at least one part of the shape from said sacrificial counter-form,
• wherein the material of said at least one deformable interface layer is inert in consolidation and does not chemically react with the powder of said sacrificial counter-form and with the powder of said volume.