Systems and methods for creating coating a substrate with nanofiber comprise a dual polarity high voltage power supply, a first wire for wire electrospinning held at positive potential by the power supply, a second wire held at negative potential by the power supply and a spooling system for drawing a substrate between the first wire and the second wire. A slider and a solution chamber in fluidic connection with the slider are used to slide along the first wire delivering solution to the wire.

Provided herein are nanofibers and processes of preparing nanofibers. In some instances, the nanofibers are metal and/or ceramic nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.

The present invention is a method for obtaining a ceramic slurry for the production of filaments for 3D FDM printing, comprising adding a polysaccharide, a glycol or an ethanolamine as a gelling agent to a suspension of ceramic material in order to produce said ceramic slurry. The invention also comprises the green body obtained from said slurry and the ceramic filament extruded from the green body.

An Oxide-Oxide (Ox-Ox) ceramic matrix composite (CMC) component includes a woven high denier ceramic fiber, the fiber comprising a plurality of tows, the woven fiber having interstitial spacing and the tows comprising the fiber having interstitial spacing, an aluminosilicate matrix, wherein the aluminosilicate matrix occupies the interstitial spacing between the fibers, and wherein the aluminosilicate matrix further occupies at least some of the interstitial spacing between the tows of the fiber. In another aspect, a method of fabricating an Oxide-Oxide (Ox-Ox) component includes the steps of providing a ceramic fiber, providing an aluminosilicate slurry, coating the fiber with the aluminosilicate slurry, filament winding the coated fiber over tooling, forming an uncured preform, removing the uncured Ox-Ox preform from the tooling, and curing the Ox-Ox preform, forming a near net shape Ox-Ox component.

The present invention relates to an alumina fiber having the content of sodium oxide of 530 to 3,200 ppm and a mass ratio (A/B) of the content (A) of the sodium oxide to the content (B) of calcium oxide of 5 to 116.

A composite comprising electrospun inorganic fibers and nanoparticles. The composite may carry a reagent, for example an oxidant. The composite may be formed by electro spinning a composition of a precursor material and nanoparticles to form a precursor composite followed by conversion of precursor fibers of the precursor composite to the inorganic fibers. The composite carrying a reagent may be used to absorb ethylene gas.

A method of producing a metal oxide fiber is described, including a spinning step of spinning a composition containing a polymetalloxane and an organic solvent to obtain a thread-like product; and a firing step of firing the thread-like product obtained in the spinning step at a temperature of 200° C. or higher and 2,000° C. or lower to obtain a metal oxide fiber, where the polymetalloxane has a repeating structure composed of a metal atom selected from the group consisting of Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Pd, Ag, In, Sn, Sb, Hf, Ta, W and Bi, and an oxygen atom and where the weight average molecular weight of the polymetalloxane is 20,000 or more and 2,000,000 or less.

Disclosed is a coated ceramic fiber including a zirconium interface coating layer deposited on the ceramic fiber, a zirconium dioxide interface coating layer adjacent to the zirconium interface coating layer, and an additional interface coating layer adjacent to the zirconium dioxide interface coating layer, wherein zirconium dioxide interface coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Provided are a cover-layer-including ceramic continuous fiber suitable for producing a ceramic matrix composite material that can have improved damage tolerance and a ceramic matrix composite material formed from the cover-layer-including ceramic continuous fiber. The cover-layer-including ceramic continuous fiber includes a ceramic continuous fiber and a cover layer formed of an inorganic acid salt and disposed on the surface of the ceramic continuous fiber, wherein the thickness variation coefficient of the cover layer is 80% or less.

A method for producing a three-dimensional porous transition alumina catalyst monolith of stacked catalyst fibers, comprising the following steps: a) Preparing a suspension paste in a liquid diluent of hydroxide precursor particles or oxyhydroxide precursor particles of transition alumina particles or mixtures thereof and which suspension can furthermore comprise a binder material in a maximum amount of 20 wt %, based on the amount of hydroxide precursor particles or oxyhydroxide precursor particles of transition alumina particles or mixtures thereof and/or a plasticizer and/or a dopant in a maximum amount of 10 wt %, based on the amount of hydroxide precursor particles or oxyhydroxide precursor particles of transition alumina particles or mixtures thereof, all particles in the suspension having a number average particle size in the range of from 0.05 to 700 m, b) extruding the paste of step a) through one or more nozzles to form fibers, and depositing the extruded fibers to form a three-dimensional porous catalyst monolith precursor, c) drying the porous catalyst monolith precursor to remove the liquid diluent, d) performing a temperature treatment of the dried porous catalyst monolith precursor of step c) at a temperature in the range of from 500 to 1000 C., to form the transition alumina catalyst monolith, wherein no temperature treatment of the porous catalyst monolith precursor or porous catalyst monolith at temperatures above 1000 C. is performed and wherein no further catalytically active metals, metal oxides or metal compounds are applied to the surface of the transition alumina precursor particles, the catalyst monolith precursor or transition alumina catalyst monolith. no further catalytically active metals, metal oxides or metal compounds are present in the suspension paste.