Abstract: A radiation-curable slurry for additive manufacturing of 3D metal objects is provided, comprising: (a) 2-45 wt % of a polymerizable resin; (b) 0.001-10 wt % of one or more polymerization photoinitiators; and (c) 55-98 wt % of a mixture of metal-containing compounds, wherein the mixture of metal-containing compounds comprises, based on the weight of said mixture, 5-95 wt % of metal particles and 5-95 wt % of one or more metal precursors. An additive manufacturing method for producing a three-dimensional metal object using the slurry is provided, as well as three-dimensional metal objects obtainable by the method.

Abstract: Extruder based print head (1) for 3D printing with a material feed unit (2) for providing material in granular and/or liquid feed form, a material extrusion unit (3) arranged to receive the material in granular and/or liquid feed form and transform the material into liquefied material in print form, and a nozzle unit (4) in fluid communication with the material extrusion unit (3), the nozzle unit (3) comprising an output channel (5) and a nozzle (6) arranged to output the liquefied material. Furthermore, an internal volume enlargement unit (7) is provided in fluid communication with the output channel (5) of the nozzle unit (4), wherein the internal volume enlargement unit (7) has a first internal volume in a first operational status and a second internal volume in a second operational status, wherein the second internal volume is larger than the first internal volume.

Abstract: The present invention concerns a method for the manufacture of a three-dimensional object, comprising (a) providing a three-dimensional model of the object, which divides the object in voxels; (b) applying a first layer of a radiation-curable slurry onto a target surface, wherein the slurry contains a polymerizable resin and a photoinitiator; (c) polymerizing the resin by illuminating the voxels of the first layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matrix; (d) applying a subsequent layer of the slurry on top of the first layer; (e) polymerizing the resin by scanning the voxels of the subsequent layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matri

Abstract: A radiation-curable slurry for additive manufacturing of 3D metal objects is provided, comprising: (a) 2-45 wt % of a polymerizable resin; (b) 0.001-10 wt % of one or more polymerization photoinitiators; and (c) 55-98 wt % of a mixture of metal-containing compounds, wherein the mixture of metal-containing compounds comprises, based on the weight of said mixture, 5-95 wt % of metal particles and 5-95 wt % of one or more metal precursors. An additive manufacturing method for producing a three-dimensional metal object using the slurry is provided, as well as three-dimensional metal objects obtainable by the method.

Abstract: The present invention relates to a radiation-curable slurry for additive manufacturing of three-dimensional metal objects, said slurry comprising: a) 2-45 wt % of a polymerizable resin; b) 0.001-10 wt % of one or more polymerization photoinitiators; c) 55-98 wt % of metal precursor particles; with the proviso that the metal precursor is not AI2O3 or ZrO2. The invention further relates to an additive manufacturing method for producing a three-dimensional metal object, said method comprising building a green body of metal precursor particles using the slurry according to the invention, removing organic binder from the green body to obtain a metal precursor brown body, converting the metal precursor brown body to a metal brown body and sintering the metal brown body to obtain a three-dimensional metal object. In a third aspect, the invention relates to a three-dimensional metal object obtainable by the method of the invention.

Abstract: Additive manufacturing apparatus and method for producing an object layer by layer. The apparatus has a slurry applicator (5) for providing a layer of slurry (3) with a predetermined thickness (d1). The slurry (3) is a suspension containing a liquid and particles eventually forming the object, and has between 10 and 70 volume % of particle content. A particle connection unit (7) is operative on the layer of slurry (3) to execute a single step particle connection process before applying a new layer of the slurry (3).