A method for making a high temperature composite, which is a carbon carbon composite, carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or a carbon silica composite, including: a) providing a precursor part including a resin comprising a poly(aryl ether ketone) (PAEK) and at least one reinforcing material, wherein the resin has a degree of crystallinity of 10% or more; b) pyrolyzing the precursor part to a pyrolyzed part; c) infusing a liquid second resin into the pyrolyzed part to make an infused part; and d) pyrolyzing the infused part to make the carbon carbon composite carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or the carbon silica composite, optionally repeating steps c. through d. Also, a carbon carbon composite, carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or carbon silica composite made by the method.

In example implementations, a method for extracting layers of build material into a carrier. The method includes providing a layer of build material onto a bed. Portions of the layer of build material on the bed are digitally printed with a liquid functional material (LFM). The method repeats providing the layer of build material and digitally printing without applying energy to the LFM to define a structure in layers of build material on the bed. The layers of build material are extracted into a carrier and the carrier is removed.

In example implementations, a method for extracting layers of build material into a carrier. The method includes providing a layer of build material onto a bed. Portions of the layer of build material on the bed are digitally printed with a liquid functional material (LFM). The method repeats providing the layer of build material and digitally printing without applying energy to the LFM to define a structure in layers of build material on the bed. The layers of build material are extracted into a carrier and the carrier is removed.

A mould for manufacturing a packing member from a liquid ceramic composition. The mould including a first part and a second part, wherein the first part and/or the second part comprise an open mould cavity and wherein the first and second parts are operable to engage to form a closed mould cavity, wherein the mould further includes a reservoir forming member, and wherein the mould is operable to be moved from an open position in which the first and second parts are at least partially spaced such that the reservoir member forms a reservoir cavity and the mould cavity is open, to a partially closed position in which the location of the reservoir cavity has moved with respect to the mould cavity and/or the volume of the reservoir cavity has reduced, and then to a closed position in which the first and second parts are engaged such that the mould cavity is closed.

The present disclosure relates to a porous ceramic media that may include a chemical composition, a phase composition, a total open porosity content of at least about 10 vol. % and not greater than about 70 vol. % as a percentage of the total volume of the ceramic media, and a nitric acid resistance parameter of not greater than about 500 ppm. The chemical composition for the porous ceramic media may include SiO.sub.2, Al.sub.2O.sub.3, an alkali component and a secondary metal oxide component selected from the group consisting of an Fe oxide, a Ti oxide, a Ca oxide, a Mg oxide and combinations thereof. The phase composition may include an amorphous silicate, quartz and mullite.

The present invention provides means capable of imparting high temporal stability to a hardening aid solution which serves as a raw material and capable of imparting high strength and high quality stability to a hardened body of the self-hardening material, in the hardened body of the self-hardening material that contains a ceramic powder containing Si element at least on the surface thereof. The present invention relates to a hardening aid solution containing Si element, an alkali, and a dispersing medium, wherein the dispersing medium contains water; a dissolution concentration of the Si element is 20000 mass ppm or more; the number of moles of the alkali present in 1 kg of the dispersing medium is 2 mol/kg or more; an absolute value of an amount of change in a dissolution concentration of Si element in a solution obtained by diluting the hardening aid solution by 2 times based on the mass using an aqueous KOH solution having a concentration of 3 mol/L is 2000 mass ppm or less, between before and after a heat dissolution test including heating the solution at a solution temperature of 80° C. for 5 hours, and then allowing the solution to stand in an ambient environment at 25° C. for 1 hour; and the hardening aid solution is used for hardening a powder containing a ceramic powder containing Si element at least on the surface thereof.

The present invention provides means capable of imparting high temporal stability to a hardening aid solution which serves as a raw material and capable of imparting high strength and high quality stability to a hardened body of the self-hardening material, in the hardened body of the self-hardening material that contains a ceramic powder containing Si element at least on the surface thereof. The present invention relates to a hardening aid solution containing Si element, an alkali, and a dispersing medium, wherein the dispersing medium contains water; a dissolution concentration of the Si element is 20000 mass ppm or more; the number of moles of the alkali present in 1 kg of the dispersing medium is 2 mol/kg or more; an absolute value of an amount of change in a dissolution concentration of Si element in a solution obtained by diluting the hardening aid solution by 2 times based on the mass using an aqueous KOH solution having a concentration of 3 mol/L is 2000 mass ppm or less, between before and after a heat dissolution test including heating the solution at a solution temperature of 80° C. for 5 hours, and then allowing the solution to stand in an ambient environment at 25° C. for 1 hour; and the hardening aid solution is used for hardening a powder containing a ceramic powder containing Si element at least on the surface thereof.

A pore-free ceramic is provided that has a high modulus of elasticity and a low coefficient of thermal expansion. A process for producing a corresponding ceramic is also provided. The pore free ceramic is a dimensionally stable substrate material in applications subjected to temperature gradients including semiconductor manufacture.

A pore-free ceramic is provided that has a high modulus of elasticity and a low coefficient of thermal expansion. A process for producing a corresponding ceramic is also provided. The pore free ceramic is a dimensionally stable substrate material in applications subjected to temperature gradients including semiconductor manufacture.

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.