A method may include fused filament fabricating a fused filament fabricated component by delivering a softened filament to selected locations at or adjacent to a build surface. The softened filament may include a binder and a primary material. The binder is configured to release a secondary material upon heating at or above a conversion temperature. The method also may include heating the fused filament fabricated component to a temperature at or above the conversion temperature to sinter the primary material to form a sintered part and cause the binder to release the secondary material within the sintered part.

A multicomponent carbide has at least five transition metals, and a valence electron concentration (VEC) is greater 8.80 electrons. Preferred off-equiatomic multicomponent carbides have five transition metals and a VEC of more than 8.80. Preferred equiatomic multicomponent carbides have five transition metals and a VEC of 9.00 or greater. The valence electron configuration is important for its relationship to the mechanical properties of carbides. Since carbon forms four bonds, when there are more than four valence electrons available from the metals, there are excess electrons in the system. This increases metallic character of bonding and therefore allows for more ductility and higher toughness.

A method of making a layered MXene material comprises a) introducing dried MAX phase powder into a vessel under anhydrous, inert conditions, the MAX phase powder comprising a general formula of M.sub.n+1AX.sub.n (n=1, 2, 3, or 4), wherein M is a transition metal or p-block metalloid selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Re, Cu, Ni, Ag, Zn, Cd, In, Sn, and Pb; interlayer A is a Group III, IV, or V metalloid selected from the group consisting of Al, Si, Ga, Ge, In, Sn, Pb, As, Bi, Sb, and X is one of C (carbon) and N (nitrogen); b) introducing a halogen and solvent to the dried MAX phase to create a halogen solution having a predetermined concentration; c) allowing a reaction to proceed for about 24 hours between 30-90 C. to create a reaction slurry comprising a MXene material.

High-entropy ultra-high temperature ceramics (HE-UHTC) coatings deposited on substrates, as well methods for depositing the HE-UHTC coatings on the substrates, are provided. An HE-UHTC electrode can be fabricated via spark plasma sintering (SPS) and then a thin coating of the HE-UHTC can be deposited in a precision-controlled manner on a substrate via an electro-spark deposition process.

This invention relates to three-dimensional printing. This invention in particular relates to a method of generating mold and printing a three-dimensional object. The mold thickness is controlled and holes are generated in the mold surface for releasing moisture easily. The mold surface having holes is designed initially digitally and then combined with the three-dimensional model before printing the three-dimensional object. In case the thickness of the mold surface is more then it reduces the overall quality of the three-dimensional object. When the model is enclosed inside the mold, there will be some residue moisture in the model even if the drying apparatus can improve this by drying layer by layer. This affects the final quality of the part. A solution of these problems is provided in the present invention. The thickness of the mold layer is between 0.5 to 1 mm and holes having 0.1 to 0.4 mm diameter. The holes are evenly distributed on the mold. The mold having the holes is prepared from which moisture can easily escape. A method of digitally generated a mold having thin layer and holes is used for fabricating three dimensional objects with high precision and quality.

This invention relates to three-dimensional printing. This invention particularly relates to a system with a dynamic variable size nozzle orifice for three-dimensional printing of objects based on crafting and molding techniques, and a method thereof. The present invention provides a dynamic variable nozzle orifice, where one embodiment uses a nozzle made of a soft flexible material. The soft flexible material, such as rubber, latex or silicone, is such that when the extrusion pressure is high the orifice will enlarge and allow wider extrusion volume for filling large or wide voids. In another scenario, when the extrusion pressure is lower the orifice will be narrower and give precise narrow extrusion to fill smaller voids. Another embodiment uses a method of controlling the orifice size which is by a mechanical means independent of the pressure in the nozzle. Such a method can utilize an iris device for controlling the size of the orifice. By utilizing the function of a dynamic orifice size of the nozzle when depositing a crafting material inside a mold structure as described herein, the printing time can be reduced without a reduction in detailing abilities. Subsequently, the systems and methods of the present invention are useful for fabricating high-quality three-dimensional objects using a crafting paste and molding techniques.

In an embodiment, a system includes a three-dimensional (3D) printer, a feedstock, and a laser. The three-dimensional printer includes a platen including an inert metal, and an enclosure including an inert atmosphere. The feedstock is configured to be deposited onto the platen. The feedstock includes a halogenated solution and a nanoparticle having negative electron affinity. The laser is configured to induce the nanoparticle to emit solvated electrons into the halogenated solution to form, by reduction, a ceramic and a diatomic halogen.

Disclosed is a method of making high temperature fiber including chemically bonding high temperature material to a fiber template at a first temperature to form a precursor fiber and processing the precursor fiber at a second temperature to form the high temperature fiber. The first temperature does not equal the second temperature. Also disclosed are high temperature fibers made by the method.

The present invention relates to aqueous suspensions containing 30 to 95 wt.-% metal carbide particles and a dispersant, and to a process for coating substrates using said aqueous suspensions. The invention also relates to the coated substrates that can be produced by the process according to the invention and to the uses thereof.

The invention relates to nickel-coated hexagonal boron nitride nanosheet composite powder, its preparation and high-performance composite ceramic cutting tool material. The composite powder has a core-shell structure with BNNS as the core and Ni as the shell. The self-lubricating ceramic cutting tool material is prepared by wet ball milling mixing and vacuum hot-pressing sintering with a phase alumina as the matrix, tungsten-titanium carbide as the reinforcing phase, nickel-coated hexagonal boron nitride nanosheet composite powder as the solid lubricant and magnesium oxide and yttrium oxide as the sintering aids. The invention also provides preparation methods of the nickel-coated hexagonal boron nitride nanosheet composite powder and the self-lubricating ceramic cutting tool material.