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1. (WO2018200590) ADDITIVE FABRICATION WITH METALLIC MATERIALS

Pub. No.:    WO/2018/200590    International Application No.:    PCT/US2018/029225
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: H04N 1/409
B29C 64/386
B29C 64/40
B29C 64/00
Applicants: DESKTOP METAL, INC.
Inventors: GIBSON, Michael, Andrew
TOBIA, Jay, Collin
BOSE, Animesh
FONTANA, Richard, Remo
HART, Anastasios, John
BARBATI, Alexander, C.
Title: ADDITIVE FABRICATION WITH METALLIC MATERIALS
Abstract:
In an aspect, multiple metallic base materials are mixed into a user-controlled multimetallic mixture and extruded into a net shape, which is thermally processed into a multimetallic and/or alloyed object. In another aspect, a superstructure is fabricated around an object, but physically isolated from the object, with a shape facilitating robotic handling of the superstructure, along with removal of powder from the object, after a three-dimensional printing process. In another aspect, a ceramic precursor is used to create a separable interface between a support structure and a sinterable object. More specifically, a sinterable structure is fabricated from a sinterable powder in an aqueous binder, and an interface layer is formed by depositing a ceramic precursor in a nonaqueous solution onto the sinterable structure. When the ceramic precursor is exposed to water in the aqueous binder, the ceramic can precipitate to form an unsinterable, ceramic interface layer between sinterable structures.