Abstract: A particulate feedstock compound for use in a powder bed additive manufacturing process comprises a) sinterable non-organic particles having a maximum particle size of 200 ?m dispersed throughout the compound particle, and b) a binder component, the binder component comprising, relative to the volume of the binder component b-i) 3 to 70% by volume of a thermoplastic polyamide having a DSC melt peak temperature TP below 160° C., and b-ii) 30 to 97% by volume of a wax or wax-type material having a drop point in the range of 20 to 160° C. Upon irradiation with an energy beam, the feedstock compound particles are converted from solid to fluid at comparably low temperature and form a dense green part without affecting adjacent feedstock compounds.

Abstract: A binder component for a feedstock compound for use in a shaping and sintering process comprises b-i) 3 to 70% by volume of at least one first thermoplastic and/or wax-type material, and b-li) 30 to 97% by volume of at least one second thermoplastic and/or wax-type material, based on the total volume of the binder component. The first thermoplastic and/or wax-type material and the second thermoplastic and/or wax-type material differ in at least one property which property is selected from (1) solubility in a solvent, (2) degradability induced by heat and/or a reactant, and (3) volatility. The first thermoplastic and/or wax-type material is less soluble, less degradable or less volatile than the second thermoplastic and/or wax-type material. Tcross is below 120° C., wherein Tcross is the temperature at the intersection between the storage modulus G? curve and the loss modulus G? curve in a dynamic viscoelasticity measurement of the binder component.

Abstract: A binder component for a feedstock compound for use in a shaping and sintering process comprises b-i) 3 to 70% by volume of at least one first thermoplastic and/or wax-type material, and b-ii) 30 to 97% by volume of at least one second thermoplastic and/or wax-type material, based on the total volume of the binder component. The first thermoplastic and/or wax-type material and the second thermoplastic and/or wax-type material differ in at least one property which property is selected from (1) solubility in a solvent, (2) degradability induced by heat and/or a reactant, and (3) volatility. The first thermoplastic and/or wax-type material is less soluble, less degradable or less volatile than the second thermoplastic and/or wax-type material. The binder component exhibits a melt viscosity, as determined at a temperature of 130° C.; and at a shear rate of 1 s?1, of below 6 Pa·s.

Abstract: A binder component b) for a particulate feedstock compound for use in a shaping and sintering process contains b-i) 3 to 70% by volume of a polyolefin, a polyolefin wax or an oxidized polyolefin wax, and b-lii) 30 to 97% by volume of a non-polymeric wax or non-polymeric wax-type substance, or a water-soluble or water-dispersible thermoplastic polymer, based on the total volume of the binder component b). The feedstock compound containing the binder component and non-organic sinterable particles is used in an additive manufacturing process, an injection molding process, a pressing process or a casting process.

Abstract: A process for the additive manufacture of a metallic and/or vitreous and/or ceramic component, a mixture of substrate particles and an at least two-phase binder is firstly provided. The mixture is preferably provided as composite particles, so that the substrate particles adhere to one another by the at least two-phase binder. The mixture is selectively melted layerwise by electromagnetic radiation so that a shaped part is additively produced. The shaped part is taken out from the mixture which has not been melted and the at least two-phase binder is subsequently removed, preferably successively. The process produces a microporous shaped part which after sintering leads to a component having a desired density and a desired mechanical and/or thermal stability.

Abstract: A process for the additive manufacture of a metallic and/or vitreous and/or ceramic component, a mixture of substrate particles and an at least two-phase binder is firstly provided. The mixture is preferably provided as composite particles, so that the substrate particles adhere to one another by the at least two-phase binder. The mixture is selectively melted layerwise by means of electromagnetic radiation so that a shaped part is additively produced. The shaped part is taken out from the mixture which has not been melted and the at least two-phase binder is subsequently removed, preferably successively. The process produces a microporous shaped part which after sintering leads to a component having a desired density and a desired mechanical and/or thermal stability.