Abstract: A method of depowdering objects (e.g., heat exchangers) having small and/or complex internal geometries and manufactured using an additive manufacturing technique performed with a powder material. The method includes applying a pressurized fluid to the objects via a pressurized fluid applicator operatively coupled to the object, thereby removing a portion of unbound powder material on or in the object. The method further includes applying vortex vibration to the object via a vortex vibration source operatively coupled to the object, thereby loosening a portion of the unbound powder material remaining on or in the object, and applying the pressurized fluid to the object via the pressurized fluid application, thereby removing a portion of the loosened, unbound powder material from the object. The latter two applying steps are repeated until a specified amount of the unbound powder material has been removed from the object.

Abstract: Embodiments of the present disclosure pertain to compositions comprising particles and a binding material, where the binding material and at least some of the particles are breakably associated with one another to form bound particles. Additional embodiments of the present disclosure pertain to methods of making the compositions by associating particles with a binding material such that the binding material and at least some of the particles become breakably associated with one another to form bound particles. Further embodiments of the present disclosure pertain to methods of additively manufacturing a material on a surface by (a) applying said bound particles onto the surface; (b) breaking at least some of the bound particles into particles; (c) applying an adhesive material onto the surface; and (d) treating the particles and any remaining bound particles to form the additively manufactured material. Additional embodiments pertain to the formed additively manufactured materials.