Abstract: A precursor diffusion device configured to diffuse a growth precursor towards an external growth surface included on an external growth member, the diffusion device including a container including at least one porous element having a porosity configured to allow or prevent the passage of a precursor fluid through a thickness of the porous element, the porous element being configured so that the precursor fluid which passes through the thickness of the porous element generates an aerosol by fragmentation of the precursor fluid, the aerosol being formed of droplets of the precursor fluid. Also, a method for depositing a layer on a growth surface by such a diffusion device.

Abstract: A metallic filter (1) includes a microstructured architecture (2) defined in a three-dimensional space having orthogonal axes, microstructured architecture (2) includes a metallic network (10) formed by a plurality of longitudinal connecting strands (12), namely extending along a longitudinal axis direction (X), and a network (20) of pores formed of a plurality of longitudinal interstices (22) located along connecting strands (12). Each longitudinal interstice corresponding to a subset of pores (24) of the network (20) of pores. The subset of pores (24) for which the pores are aligned along the longitudinal axis (X), the longitudinal interstices (22) thereby defining an axis of anisotropy of the microstructured architecture.

Abstract: A part including a porous structure including cellular pores and formed at least in part by the periodic repetition of a basic pattern, each cellular pore being delimited by a wall, made of a metal or a polymer, having a parietal porosity greater than 5% and including parietal pores with a mean size less than the mean size of the cellular pores.

Abstract: A manufacturing method enabling the obtainment of a functional part essentially formed in a metallic material, all or part of the functional part delimiting a filtering medium permeable to a fluid and delimiting first and second main faces for a preferred circulation of the gas through the filtering medium. The method includes a main phase consisting of an additive manufacturing method in successive passes from a support tray. Each pass includes the deposition of at least one layer of the metallic material, the deposited material adhering to the metallic material deposited before. The deposition is controlled at each pass so the stack of metallic material constitutes the functional part. The filtering medium includes a coalescent network of connecting strands interconnected according to a three-dimensional spatial distribution between the faces, the connecting strands of the network delimiting therebetween pores spatially distributed within the filtering medium in three dimensions between the faces.

Abstract: Part comprising a steel material whose constituent grains comprise a matrix in which precipitates are incorporated, the precipitates comprising at least one metallic element selected from a metallic element M, a metallic element M?, a metallic element M? or mixtures thereof; the microstructure of the steel being such that the grains are equiaxed and the average grain size being such that the average of their largest dimension “D max” and/or the average of their smallest dimension “D min” is comprised between 10 ?m and 50 ?m. The steel material has optimised, stable and isotropic mechanical properties, in particular so that the steel material can best withstand mechanical and/or thermal stresses.