Materials for selective sintering of cohesive feedstocks

Abstract

A method of forming three-dimensional objects includes depositing a sinterable, dense feedstock comprising a sinterable material and binder onto a surface, depositing a sintering selectivity material according to a pattern, removing the binder, sintering the sinterable, dense feedstock to form a three-dimensional sintered object, and finishing the sintered object. A sintering-selectivity material includes a solvent, and a sintering-selectivity material in the solvent, the sintering-selectivity material having the characteristic of being able to penetrate a dense feedstock. A system has a surface, a feedstock deposition head arranged to deposit a sinterable, dense feedstock on the surface, a sintering-selectivity deposition head arranged to deposit a sintering-selectivity material on at least one of the surface and the feedstock, a debinding mechanism arranged to debind the feedstock from the binder, and a sintering chamber to sinter the feedstock after debinding.

Dependencies are inferred from the claim text.