The invention relates to a process for producing a three-dimensional green body by a fused filament fabrication process employing at least one filament, which comprises a core material (CM) coated with a layer of a shell material (SM), and a three-dimensional extrusion printer (3D printer). The three-dimensional extrusion printer 0 contains at least one nozzle and at least one mixing element. The invention further relates to three-dimensional objects and an extruded strand obtained by the process.

A method of forming a composite component. The method includes laying up a plurality of composite plies to form a composite ply core. Another step of the method includes partially processing the composite ply core to form a green state core. The method further includes machining a cooling cavity on an exterior surface of the green state core. Additionally, the method includes inserting a filler material within the cooling cavity. A further step includes wrapping composite plies around the green state core and filler material to secure the filler material and form an outer enclosure. In one step, the method includes processing the green state core and outer enclosure to form the composite component.

Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the d.sub.50 median diameter of the core particles is 1 m or greater and the ratio of the d.sub.50 median diameter of the composite particles to the d.sub.50 median diameter of the core particles is 1.15 or greater, are provided. A method to prepare the particles includes dissolution of a polymer in a solvent and reprecipitation of the polymer in the presence of a suspension of the core particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.

A binder for an injection moulding composition including: from 40 to 55 volume percent of a polymeric base, from 35 to 45 volume percent of a mixture of waxes or a mixture of wax and palm oil, and at least 5 volume percent of at least one surfactant, wherein the polymeric base is formed of copolymers of ethylene and methacrylic or acrylic acid, copolymers of ethylene and propylene and/or maleic anhydride-grafted polypropylene, and polymers soluble in isopropyl alcohol, propyl alcohol and/or turpentine, and chosen from the group including a cellulose acetate butyrate, a polyvinyl butyral and a copolyamide, the respective quantities of the binder components being such that their sum is equal to 100 volume percent of the binder.

There is provided a ferrite powder for bonded magnets capable of producing ferrite bonded magnets with high BH.sub.max, excellent in MFR when converted to a compound, with high p-iHc, wherein an average particle size of particles obtained by a dry laser diffraction measurement is 5 m or less, a specific surface area is 1.90 m.sup.2/g or more and less than 3.00 m.sup.2/g, a compression density is 3.40 g/cm.sup.3 or more and less than 3.73 g/cm.sup.3, and a compressed molding has a coercive force of 2800 Oe or more and less than 3250 Oe.

A sinterable magnetic powder composition including: from 50 to 95% of a powder magnet; and from 5 to 50% by weight of at least one thermoplastic polymer; for the total weight of the composition, said powder composition having a D50 comprised within the range of 0.1 to 100 m. And, to the use of the composition in processes used to agglomerate powders, layer by layer, by melting or sintering, for manufacturing three-dimensional magnetic objects.

Provided is a method for forming a ceramic article, including disposing a slurry in a mold, wherein the slurry includes a ceramic powder and a photoctivable pre-polymer; and forming a green ceramic article wherein forming includes exposing the slurry to radiant energy, such as ultraviolet radiation, wherein the radiant energy catalyzes polymerization of the prepolymer. In another aspect, provided is method for forming an article, including disposing a slurry in a mold, wherein the slurry includes a photoactivable pre-polymer and a powder and the powder includes a ceramic powder, a metal powder, or both; and exposing the slurry to ultraviolet radiation wherein the ultraviolet radiation catalyzes polymerization of the pre-polymer.

A ferrite composition having a formula of Ba.sub.xNi.sub.2-yCu.sub.yTi.sub.3Fe.sub.zO.sub.31, wherein 4.5?x?5.5 0<y<2 or 0.05?y?1.5, and 11?z?13.

Provided herein are methods for forming nanofibers. The current disclosure provides ceramic nanofibers, morphology-controlled ceramic-polymer hybrid nanofibers, morphology-controlled ceramic nanofibers, core-sheath nanofibers and hollow core nanofibers using ceramic precursor materials and polymer materials which are combined and undergo electrospinning. The current disclosure provides for methods of forming these nanofibers at low temperatures such as room temperature and in the presence of oxygen and moisture wherein the ceramic precursor cures to a ceramic material during the electrospinning process. Also disclosed are the nanofibers prepared by the disclosed methods.

An alumina fiber aggregate that is formed of alumina short fibers and has been subjected to needling treatment, wherein the alumina short fibers have an average fiber diameter of 6.0 m or more and 10.0 m or less and a specific surface area of 0.2 m.sup.2/g or more and 1.0 m.sup.2/g or less, and a residual percentage (%) of high-temperature-cycle opened gap pressure of the alumina fiber aggregate is 45% or more. A value obtained by subtracting twice the standard error of a length-weighted geometric mean diameter of fiber diameters of the alumina short fibers from the length-weighted geometric mean diameter is 6.0 m or more. A proportion of alumina short fibers having a fiber diameter of more than 10.0 m is preferably 5.0% or less on a number basis.