This disclosure, and the exemplary embodiments provided herein, include 3D printed titanium composites and methods including 1 vol. % carbon nanotube reinforcements on selective laser melt printed Ti64. The interrelationships with laser energy density, laser power, and laser scan speed are demonstrated and discussed. Utilizing selective laser melting, according to one exemplary embodiment of this disclosure, a >99% dense Ti-CNT composite is disclosed with microhardness of 4.75 GPa—a 30% enhancement over its Ti64 counterpart.

A stereolithography method of manufacture of a polymer structure having a spatially gradient dielectric constant, including: providing a volume of a liquid, radiation-curable composition; irradiating a portion of the liquid, radiation-curable composition with activating radiation in a pattern to form a layer of the polymer structure; contacting the layer with the liquid, radiation-curable composition; irradiating the liquid, radiation-curable composition with activating radiation in a pattern to form a second layer on the first layer; and repeating the contacting and irradiating to form the polymer structure, wherein the polymer structure comprises a plurality of unit cells wherein each unit cell is integrally connected with an adjacent unit cell, each unit cell is defined by a plurality of trusses formed by the irradiation, wherein the trusses are integrally connected with each other at their respective ends, and the trusses of each unit cell are dimensioned to provide the spatially gradient dielectric constant.

The invention is directed to a method and an apparatus for building up a workpiece layer by layer in the course of an additive manufacturing process, in particular in the form of a powder-bed process, wherein grains of a powder are fused to one another by using a binder, wherein the binder used is a heat-curable adhesive which is not applied selectively but layer by layer and which is activated and cured by a controlled energy source, in particular a laser with a controlled laser beam, and thereby fuses respectively adjacent grains of the powder.

In an aspect, the present disclosure is directed to a composite structure. The composite structure includes a three-dimensional (3-D) grid structure and at least one monolithic skin layer at least partially enveloping and securing the grid structure. As such, the grid structure is configured to stabilize the composite structure under at least one of: static local buckling and dynamic global buckling.

A method for manufacturing an additively manufactured article, the method comprising subjecting a powder material comprising a first powder containing a precipitation hardening stainless steel and a second powder containing titanium carbide to weaving irradiation with a laser beam to melt and solidify the powder material, thereby laminating at least one hardened clad layer on a base material. In the step for laminating the clad layer, the following requirements are satisfied: 20≤A≤35, 1.1≤B≤1.3, and (40% by mass)≤R2≤(65% by mass). In the formulae, A represents a laser heat input index, B represents a powder feeding rate index, and R2 represents a content ratio of the second powder in the powder material.

A method for manufacturing an additively manufactured article, the method comprising subjecting a powder material comprising a first powder containing a precipitation hardening stainless steel and a second powder containing titanium carbide to weaving irradiation with a laser beam to melt and solidify the powder material, thereby laminating at least one hardened clad layer on a base material. In the step for laminating the clad layer, the following requirements are satisfied: 20≤A≤35, 1.1≤B≤1.3, and (40% by mass)≤R2≤(65% by mass). In the formulae, A represents a laser heat input index, B represents a powder feeding rate index, and R2 represents a content ratio of the second powder in the powder material.

An example of a jettable antioxidant formulation is for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water soluble or water miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

A method for the application of hydrous mineral binder compositions which contain fibres. An aqueous accelerator is mixed with the aqueous binder composition in a mixer shortly before the application. The method is very robust and makes it possible to quickly produce even large moulded bodies having a uniform surface and very good strength development properties.

A method for the application of hydrous mineral binder compositions which contain fibres. An aqueous accelerator is mixed with the aqueous binder composition in a mixer shortly before the application. The method is very robust and makes it possible to quickly produce even large moulded bodies having a uniform surface and very good strength development properties.

The invention relates to an acrylic alloy composition that can be 3-D printed by a material extrusion additive manufacturing process, to an acrylic filament that has a very uniform diameter useful in the extrusion additive manufacturing process, to acrylic articles made from the acrylic alloy composition by a material extrusion additive process, and to a material extrusion additive manufacturing process for producing the acrylic articles. The acrylic alloy composition is an alloy of an acrylic polymer, and a low melt viscosity polymer, such as polylactic acid. The alloy may optionally be impact modified, preferably with hard core core-shell impact modifiers.