Use of a deformable interface for the fabrication of complex parts

Abstract

An assembly for densification under load along at least one direction of compression. The assembly includes: at least one volume to be densified having a powdery and/or porous composition and having variations in thickness along the direction of compression; and at least one counter-form of a powdery and/or porous composition, having at least one face facing at least one portion of the volume. The face and each of the portions are separated by at least one deformable interface layer.

1 . An assembly for densification under load along at least one direction of compression, comprising:
 at least one volume to be densified having a powdery and/or porous composition, this volume to be densified having variations in thickness along said direction of compression,   at least one counter-form of powdery and/or porous composition, having at least one face facing at least one portion of said volume, wherein said portion and said face are separated by at least one deformable interface layer.   
     
     
         2 . The assembly according to  claim 1 , wherein said variations of thicknesses are continuous. 
     
     
         3 . The assembly according t  claim 1 , wherein said counter-form and said volume to be densified are of distinct shapes. 
     
     
         4 . The assembly according to  claim 1 , wherein said counter-form includes said volume in its totality. 
     
     
         5 . The assembly according to  claim 1 , wherein the speed of densification of the material constituting said volume is greater than or equal to the speed of densification of the material constituting said counter-form. 
     
     
         6 . The assembly according to  claim 1 , wherein said volume and said counter-form have a chemical composition and/or a microstructure that are identical. 
     
     
         7 . The assembly according to  claim 1 , wherein said volume and said counter-form have a chemical composition and/or a microstructure that are different. 
     
     
         8 . The assembly according to  claim 1 , wherein said portion and said face are separated by a plurality of consecutive deformable interface layers. 
     
     
         9 . The assembly according to  claim 1 , wherein:
 said assembly has a plurality of volumes to be densified having a powdery and/or porous composition and having variations in thickness along said direction of compression,   said counter-form has at least one face facing at least one portion of each of said volumes,   said face and each of said portions are separated by at least one deformable interface layer.   
     
     
         10 . A method for fabricating at least one part of complex shape, wherein the method comprises:
 incorporating, within an assembly for densification under load along at least one direction of compression, a deformable interface layer having an initial geometrical shape and separating at least one portion of a volume to be densified of a powdery and/or porous composition and having variations of thickness along said direction of compression from at least one face of a counter-form of a powdery and/or porous composition, and   densification under load of said assembly during which said interface layer is deformed to adopt a final geometrical shape distinct from said initial geometrical shape.   
     
     
         11 . The method of fabricating according to  claim 10 , further comprising extracting said part from said assembly by sacrificial destruction of said counter-form and/or said deformable interface layer.