Abstract: A refractory article includes a body having a first portion defining at least a portion of a first exterior surface of the body, the first portion including a carbide, and further including a second portion defining at least a portion of a second exterior surface of the body opposite the first exterior surface, the second portion including an oxide, and a thermal conductivity difference (?TC) of at least 10 W/mK between the first exterior surface and the second exterior surface, and an average Shell Temperature of not greater than 400° C.

Abstract: A ?-SiC coating made by the method of mixing SiO2 with carbon and heating the mixture in vacuum wherein the carbon is oxidized to CO gas and reduces the SiO2 to SiO gas and reacting a carbon material, comprising stainless steel with a carbon coating, with the SiO gas at a temperature in the range of 1300 to 1600° C. resulting in a SiC coating on the stainless steel.

Abstract: The present disclosure provides a film stack structure formed on a substrate and methods for forming the film stack structure on the substrate. In one embodiment, the method for forming a film stack structure on a substrate includes depositing a first adhesion layer on an oxide layer formed on the substrate and depositing a metal layer on the first adhesion layer, wherein the first adhesion layer and the metal layer form a stress neutral structure.

Abstract: In a hot isostatic pressing (HIP) method, the component to be treated, affected by imperfections, like porosity, cracks and cavities in its structure, is placed into a container together with non-metallic material in form of powder or grains having size greater than the porosity and the cracks and imperfections of the component. During the HIP process, the non-metallic material presses on the whole surface of the embedded component in order to generate a combination of temperature and forces capable to reduce defects, embedded and not embedded, in the component itself. The component is not contaminated during the process thus allowing easily removal of the non-metallic material by a simple operation of mechanical cleaning or chemical washing.

Abstract: Provided are a sintered ceramic and a ceramic sphere which are inhibited from suffering surface peeling due to fatigue resulting from repetitions of loading and can attain an improvement in dimensional accuracy when subjected to surface processing and which have excellent wear resistance and durability.

Abstract: An electrochemical device includes a composite material of general Formula (1-x)J-(x)Q wherein: J is a metal carbon alloy of formula SnzSiz?MetwMet?w?Ct; Q is a metal oxide of formula A?M?M???O?; and wherein: A is Li, Na, or K; M and M? are individually Ge, Mo, Al, Ga, As, Sb, Te, Ti, Ta, Zr, Ca, Mg, Sr, Ba, Li, Na, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Rt, Ru or Cd; Met and Met? are individually Ge, Mo, Al, Ga, As, Sb, Te, Ti, Ta, Zr, Ca, Mg, Sr, Ba, Li, Na, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Rt, Ru or Cd; 0<x<1; ? is 0, 1, or 2; 0<??1; 0????1; ? is 0.5, 1, 2, or 3; 0<t?5; 1?w?5; 0<w??5; 1?z?5; and 0<z??5.

Abstract: A process for the fabrication of a SiC-based article that includes preparing an aqueous suspension with SiC powder, a titanium source, a carbon source and boron carbide powder, spray drying the mixture to obtain a powder, preparing a green body from the powder, applying heat treatment to the green body in a pyrolysis/thermolysis step, pressureless sintering the green body, optimally followed by HIPing for further densification.

Abstract: A composite material has general Formula (1-x)J-(x)Q wherein: J is a metal carbon alloy of formula SnzSiz?MetwMet?w?Ct; Q is a metal oxide of formula A?M?M???O?; A is Li, Na, or K; M, M?, Met, and Met? are individually Ge, Mo, Al, Ga, As, Sb, Te, Ti, Ta, Zr, Ca, Mg, Sr, Ba, Li, Na, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Rt, Ru or Cd; 0<x<1; ? is 0, 1, or 2; 0<??1; 0????1; ? is 0.5, 1, 2, or 3; 0<t?5; and the sum of z, z?, w, and w? is greater than 0.

Abstract: The invention relates to powder comprising at least one element M, at least one element A and at least one element X, in the respective proportions (n+1±?1), 1±?2 and n±?3, in which: A is chosen from Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, P, As and S; M is a transition metal; X is chosen from B, C and N; n is an integer equal to 1, 2 or 3; and ?1, ?2 and ?3 independently represent a number ranging from 0 to 0.2, said powder having a mean particle size of less than 500 nm.

Abstract: A composition having nanoparticles of silicon carbide and a carbonaceous matrix or silicon matrix. The composition is not in the form of a powder. A composition having silicon and an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining silicon and the organic compound and heating to form silicon carbide or silicon nitride nanoparticles.

Abstract: A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.

Abstract: Composite bodies made by a silicon metal infiltration process that feature a silicon intermetallic, e.g., a metal silicide. Not only does this give the composite material engineer greater flexibility in designing or tailoring the physical properties of the resulting composite material, but the infiltrant also can be engineered compositionally to have much diminished amounts of expansion upon solidification, thereby enhancing net-shape-making capabilities. These and other consequences of engineering the metal component of composite bodies made by silicon infiltration permit the fabrication of large structures of complex shape.

Abstract: A precursor formulation of a silicon carbide material that includes a ceramic material and a boron-11 compound. The ceramic material may include silicon and carbon and, optionally, oxygen, nitrogen, titanium, zirconium, aluminum, or mixtures thereof. The boron-11 compound may be a boron-11 isotope of boron oxide, boron hydride, boron hydroxide, boron carbide, boron nitride, boron trichloride, boron trifluoride, boron metal, or mixtures thereof. A material for use in a nuclear reactor component is also disclosed, as are such components, as well as a method of producing the material.

Abstract: In order to achieve the object of providing a mixture by means of which, in particular, sintered moldings can be obtained that are virtually free of surface stains produced by soot particles, a mixture is proposed which comprises at least one pressing aid and at least one additive, wherein the additive is selected from a group of substances which have releasable carbon dioxide.

Abstract: The invention relates to a cathodic sputtering target composition comprising at least a solid lithium-based electrolyte and an inorganic carbon free polymer, and to a method for the manufacturing of cathodic solid sputtering targets using such a composition. The invention also relates to solid sputtering targets obtained by such a method and to their use for the preparation of solid thin films by a sputtering physical vapor deposition process, in particular for the preparation of solid electrolyte thin films inside thin film batteries.

Abstract: The invention relates to a method for producing a polysilane-polycarbosilane copolymer solution. Said method comprises the preparation of a polysilane, obtained by the disproportionation of a methylchlorodisilane or a mixture of methylchlorodisilanes of formula Si2MenC16-n with a Lewis base as the catalyst, a subsequent thermal cross-linking of the polysilane to form an infusible polysilane-polycarbosilane copolymer that is soluble in inert solvents, in addition to the production of said solution by the dissolution of the polysilane-polycarbosilane copolymer in an inert solvent. The invention also relates to a method for producing oxygen-depleted ceramic fibers and other molded bodies with a composition similar to that of SiC. Said method comprises the spinning of the solution to obtain green fibers according to the dry spinning method and the pyrolysis of the dried green fibers in an inert gas atmosphere or a reductive atmosphere.

Abstract: A monolithic, unitary, seamless and physically continuous ceramic armor plate having first regions of one mechanical property and one chemical composition and one microstructural composition isolated from one another by a network of second regions of another mechanical property different from the one mechanical property and another chemical composition different from the one chemical composition and another microstructural composition different from the one microstructural composition, the one mechanical property and the another mechanical property being the propensity to crack.

Abstract: A composition having nanoparticles of silicon carbide and a carbonaceous matrix or silicon matrix. The composition is not in the form of a powder. A composition having silicon and an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining silicon and the organic compound and heating to form silicon carbide or silicon nitride nanoparticles.

Abstract: There is provided a silicon carbide-based porous body which can avoid excessive temperature elevation when it is used as a filter and the captured particulate matter (PM) is burnt for removal and which is low in strength reduction caused by heat cycle. The silicon carbide-based porous body comprises a plurality of silicon carbide (SiC) particles as an aggregate and a plurality of binding phases which bind the silicon carbide particles to each other, wherein of the binding phases, the phase having the largest volume is either of a Si phase and a phase (a metal silicide phase) made of at least one member selected from the group consisting of a Ti silicide, a Zr silicide, a Mo silicide and a W silicide, all having a linear thermal expansion coefficient at 40 to 800° C., higher than that of Si by at least 3×10?6 (° C.

Abstract: A silicon carbide based porous material, which contains a metal silicide in an amount of 1 to 30% by mass and having a porosity of 38 to 80%, is provided.

Abstract: A superhard element (22) for a machine tool, comprising polycrystalline cubic boron nitride (PCBN) material containing whiskers of a ceramic material, the PCBN material comprising at least about 50 volume percent cubic boron nitride (cBN) material dispersed in a binder matrix comprising a compound including titanium and the whiskers; the content of the whiskers being at least 1 weight percent and at most 6 weight percent of the binder matrix.

Abstract: Industrial blast nozzles are disclosed which have liners made, at least in part, from a SiAlON-containing ceramic material which has a surface resistance of about 12 megaOhms or less and an erosion rate of about 1.9×10?4 cm3/g or less. The SiAlON-containing ceramic material preferably contains a two-phase SiAlON, silicon carbide, and a conductive phase that is one or more of titanium nitride, tantalum nitride, zirconium nitride, and titanium carbide.

Abstract: Methods of forming composite materials include coating particles of titanium dioxide with a substance including boron (e.g., boron carbide) and a substance including carbon, and reacting the titanium dioxide with the substance including boron and the substance including carbon to form titanium diboride. The methods may be used to form ceramic composite bodies and materials, such as, for example, a ceramic composite body or material including silicon carbide and titanium diboride. Such bodies and materials may be used as armor bodies and armor materials. Such methods may include forming a green body and sintering the green body to a desirable final density. Green bodies formed in accordance with such methods may include particles comprising titanium dioxide and a coating at least partially covering exterior surfaces thereof, the coating comprising a substance including boron (e.g., boron carbide) and a substance including carbon.

Abstract: Embodiments of the present invention disclosed herein include a sintering aid composition that has a material useful for sintering, an amine, and optionally a carboxylic acid.

Abstract: The application discloses and claims an oxidation resistant, continuous-fiber-reinforced ceramic composition, durable at temperatures above 1000° C., and capable of taking on any arbitrary near net shape formed without machining and tooling. The composition of the invention comprises a fine grained ceramic matrix which in turn comprises a mixture of a ZrB2 phase and a SiC phase with the matrix being reinforced with SiC or C or an oxide fiber, resulting in a fine grained ZrB2—SiC matrix with domain sizes ?0.5 ?m. The ZrB2 phase of the invention is capable of forming small microcrystalline domains ?0.5 ?m upon heat treatment. The composition the invention also comprises a fiber reinforced composite with a high degree of filling and densification of its preform resulting in a composition containing a low level of porosity and high fiber volume fraction.

Abstract: A method of sintering a ZrB2—SiC composite body at ambient pressures, including blending a first predetermined amount of ZrB2 powder with a second predetermined amount of SiC powder, wherein both powders are characterized by the presence of surface oxide impurities. Next the blended powders are mixed to yield a substantially homogeneous powder mixture and a portion of the substantially homogeneous powder mixture is formed into a green body. The body is fired to a first temperature, wherein substantially all surface oxide impurities are reduced and/or volatilized to substantially eliminate oxides from the green body, and the body is heated to a second temperature and sintered to yield a composite body of at least about 99 percent theoretical density and characterized by SiC whisker-like inclusions distributed substantially evenly in a ZrB2 matrix.

Abstract: A toughened composite material, having a first phase defining a matrix and a plurality of typically second phase particles dispersed in the first phase matrix. Each respective particle is characterized by a predetermined geometric architecture, such as a spiral shape. The presence of the geometrically distinct dispersed second phase operates to deflect and attenuate crack propagation.

Abstract: Current top performing SAPI systems are B4C-containing (hot pressed B4C or reaction bonded B4C). These systems will not function well versus future WC/Co threats due to the inability of B4C to withstand high pressure impacts. New approaches will be needed for next generation SAPI ceramics. Three related concepts are disclosed herein, each of which will lead to improved reaction bonded ceramics for next generation SAPI applications. The first concept aims to reactively heat treat reaction bonded B4C, causing. SiC and SiB6 to form at the expense of B4C. The second approach will add Ti to the system, thus allowing TiC and TiB2 to form at the expense of B4C. Finally, the third concept will evaluate the use of finer particle sizes, thus improving the static properties of the ceramics (with the aim of enhancing multi-hit performance). In all cases, preliminary work has been conducted to demonstrate the viability of the concepts. This will lead to a new family of advanced armor ceramics.

Abstract: The present invention provides a slurry for preparing boron nitride aggregates of spherical geometry, comprising: 3 wt %˜25 wt % of boron nitride; 1 wt %˜25 wt % of a nano-ceramic material; and a solvent as a complement to 100 wt %. In comparison with conventional preparation methods, preparation of boron nitride aggregates of spherical geometry at relatively low temperature can be achieved by using the slurry. Therefore, the demands of energy conservation and low cost are fulfilled. Besides, the present invention also provides a method for preparing boron nitride aggregates of spherical geometry.

Abstract: A method of sintering a ZrB2—SiC composite body at ambient pressures, including blending a first predetermined amount of ZrB2 powder with a second predetermined amount of SiC powder, wherein both powders are characterized by the presence of surface oxide impurities. Next the blended powders are mixed to yield a substantially homogeneous powder mixture and a portion of the substantially homogeneous powder mixture is formed into a green body. The body is fired to a first temperature, wherein substantially all surface oxide impurities are reduced and/or volatilized to substantially eliminate oxides from the green body, and the body is heated to a second temperature and sintered to yield a composite body of at least about 99 percent theoretical density (more typically at least about 99.5 percent theoretical density) and characterized by SiC whisker-like inclusions distributed substantially evenly in a ZrB2 matrix.

Abstract: A composition for ceramic extrusion-molded bodies includes a ceramic material, a water-soluble cellulose ether, a styrenesulfonate and water. A method for manufacturing a ceramic extrusion-molded body using the composition is also provided.

Abstract: A sintered material based on silicon carbide (SiC) reactively sintered between 1,100° C. and 1,700° C. to form a silicon nitride binder (Si3N4), intended in particular for fabricating an aluminum electrolysis cell, including 0.05% to 1.5% of boron, the Si3N4/SiC weight ratio being in the range 0.05 to 0.45.

Abstract: A sintered refractory block based on silicon carbide (SiC) with a silicon nitride (Si3N4) bond, for the manufacture of a aluminium electrolysis vessel, characterized in that it comprises, expressed in percentage by weight, at least 0.05% boron and/or between 0.05 and 1.2% calcium.

Abstract: A sensor system, and an associated method for detecting harsh environmental conditions, is provided. The sensor system includes at least one sensor having an electrical sensing element. The electrical sensing element is based on certain classes of composite materials: (a) silicon carbide (SiC); (Mo,W)5Si3C; (Mo,W)Si2; or (b) (Mo,W)5Si3C; (Mo,W)Si2; (Mo,W)5Si3. The sensor system is useful for determining harsh environmental conditions. Gasification systems, which include at least one of the sensor systems are also described.

Abstract: A reaction sintered silicon carbide-based product, including a silicon carbide component, a bond component, wherein the bond component includes silicon oxynitride in excess of any silicon nitride of the bond component, and at least one boron component residual to an amount present prior to reaction sintering to cause increased resistance of the reaction sintered silicon carbide-based product to volume change under oxidative stress, and methods of making the same.

Abstract: A dense silicon carbide (SiC) material with boron (B), nitrogen (N) and oxygen (O) as the only additives and with excellent insulting performance (electrical volume resistivity greater than 1×108 ?·cm). The SiC ceramic material, made from a powder mix of, by weight, from 0.1 to 7% boron carbide, from 0.1 to 7% silicon nitride, from 0.1 to 6% silicon dioxide, and a balance of ?-SiC, consists essentially of (1) at least 90% by weight of ?-SiC, (2) about 0.3 to 4.0% by weight of boron, (3) about 0.1 to 6.0% by weight of nitrogen, (4) about 0.06 to 0.5% by weight of oxygen, and (5) no more than 0.07% by weight of metallic impurities; wherein the boron and nitrogen are present according to an B/N atomic ratio of 0.9 to 1.5. In particular, this material is suitable for applications in plasma etching chambers for semiconductor and integrated circuit manufacturing.

Abstract: An electrostatic dissipative (ESD) article includes a body having a volume resistivity within a range between about 104 ohm-cm and about 1010 ohm-cm as measured at 23° C. and 500 V. The body also has a first phase including a nitride, a second phase including a carbide, and a third phase including an oxide material.

Abstract: Disclosed herein is a component in a combustion system comprising a composite, the composite comprising silicon carbide; and a refractory metal silicide comprising a phase selected from Rm5Si3, Rm5Si3C, RmSi2, and a combination thereof; wherein Rm is a refractory metal selected from molybdenum, tungsten, and a combination thereof. Also disclosed is a process for preventing slag, ash, and char buildup on a surface, comprising disposing a first surface of the composite on the surface; replacing a component comprising the surface with a component consisting of the composite; or a combination thereof.

Abstract: A cutting insert 1 is made of an aluminum oxide-based composite sintered body constituted by a ternary ceramic material including aluminum oxide, silicon carbide, and a sialon. The sialon in the aluminum oxide-based composite sintered body is Si—Al—O—N as defined by JCPDS No. 32-0026 in X-ray diffraction analysis.

Abstract: Disclosed herein is a component in a combustion system comprising a composite, the composite comprising silicon carbide; and a refractory metal silicide comprising a phase selected from Rm5Si3, Rm5Si3C, RmSi2, and a combination thereof; wherein Rm is a refractory metal selected from molybdenum, tungsten, and a combination thereof. Also disclosed is a process for preventing slag, ash, and char buildup on a surface, comprising disposing a first surface of the composite on the surface; replacing a component comprising the surface with a component consisting of the composite; or a combination thereof.

Abstract: The invention proposes a method of locally colouring a part made of ceramic material of the metallic oxide type mainly including the following steps of taking a support for the part and a laser, able to move relative to each other in an XY plane, performing a plasma treatment of the part using a gas containing one element selected from among nitrogen an carbon, so as to convert a surface layer of metallic oxide, into a substantially stoichiometric ceramic chosen from among metal nitrides and carloides, locally illuminating the part with the laser beam so as to provide sufficient energy to cause a local change in colour by altering the stoichiometry of the surface layer, and scanning the surface of the part using the laser beam so as to form a determined pattern.

Abstract: A precursor of a ceramic adhesive suitable for use in a vacuum, thermal, and microgravity environment. The precursor of the ceramic adhesive includes a silicon-based, preceramic polymer and at least one ceramic powder selected from the group consisting of aluminum oxide, aluminum nitride, boron carbide, boron oxide, boron nitride, hafnium boride, hafnium carbide, hafnium oxide, lithium aluminate, molybdenum silicide, niobium carbide, niobium nitride, silicon boride, silicon carbide, silicon oxide, silicon nitride, tin oxide, tantalum boride, tantalum carbide, tantalum oxide, tantalum nitride, titanium boride, titanium carbide, titanium oxide, titanium nitride, yttrium oxide, zirconium boride, zirconium carbide, zirconium oxide, and zirconium silicate. Methods of forming the ceramic adhesive and of repairing a substrate in a vacuum and microgravity environment are also disclosed, as is a substrate repaired with the ceramic adhesive.

Abstract: Methods of forming composite materials include coating particles of titanium dioxide with a substance including boron (e.g., boron carbide) and a substance including carbon, and reacting the titanium dioxide with the substance including boron and the substance including carbon to form titanium diboride. The methods may be used to form ceramic composite bodies and materials, such as, for example, a ceramic composite body or material including silicon carbide and titanium diboride. Such bodies and materials may be used as armor bodies and armor materials. Such methods may include forming a green body and sintering the green body to a desirable final density. Green bodies formed in accordance with such methods may include particles comprising titanium dioxide and a coating at least partially covering exterior surfaces thereof, the coating comprising a substance including boron (e.g., boron carbide) and a substance including carbon.

Abstract: The present invention contemplates the addition of zirconium compounds to well known ceramic ballistic materials to increase resistance to penetration by projectiles. In the preferred embodiments of the present invention, the zirconium compound that is employed consists of ZrO2 and is provided in the range of about 0.1% to about 11%, by weight, of starting material before densification. Preferred ranges of proportion of ZrO2 in the finished ceramic material are in the ranges of about 0.30% to about 0.75%, by weight, or about 8-9%, by weight. The ballistic material using the combination of SiC with low volume of sintering aid and ZrO2 raises the theoretical density of the ceramic material to between 3.225 and 3.40 g/cc, which is slightly higher than the typical 3.22 g/cc theoretical density for hot pressed fully dense SiC.

Abstract: A ceramic material for an optical member which shows black, wherein the ceramic material comprises a reaction-sintered sintered ceramic body prepared by synthesizing a formed body of a mixture comprising a ceramic raw material and a component that accelerates blackening, making use of a reaction sintering; and wherein the ceramic material is a porous body.

Abstract: A method of forming a nanoscale ceramic composite generally includes modifying a polymeric ceramic precursor, mixing the modified polymeric ceramic precursor with a block copolymer to form a mixture, forming an ordered structure from the mixture, wherein the modified polymeric ceramic precursor selectively associates with a specific type of block of the block copolymer, and heating the ordered structure for a time and at a temperature effective to form the nanoscale ceramic composite.

Abstract: A recrystallized silicon carbide body is provided that has a resistivity of not less than about 1E5 ? cm and a nitrogen content comprising nitrogen atoms bonded within the body, wherein the nitrogen content is not greater than about 200 ppm.

Abstract: A dense silicon carbide (SiC) material with boron (B), nitrogen (N) and oxygen (O) as the only additives and with excellent insulting performance (electrical volume resistivity greater than 1×108 ?.cm). The SiC ceramic material, made from a powder mix of, by weight, from 0.1 to 7% boron carbide, from 0.1 to 7% silicon nitride, from 0.1 to 6% silicon dioxide, and a balance of ?-SiC, consists essentially of (1) at least 90% by weight of ?-SiC, (2) about 0.3 to 4.0% by weight of boron, (3) about 0.1 to 6.0% by weight of nitrogen, (4) about 0.06 to 0.5% by weight of oxygen, and (5) no more than 0.07% by weight of metallic impurities; wherein the boron and nitrogen are present according to an B/N atomic ratio of 0.9:1 to 5:1. In particular, this material is suitable for applications in plasma etching chambers for semiconductor and integrated circuit manufacturing.

Abstract: A method of sintering a ZrB2—SiC composite body at ambient pressures, including blending a first predetermined amount of ZrB2 powder with a second predetermined amount of SiC powder, wherein both powders are characterized by the presence of surface oxide impurities. Next the blended powders are mixed to yield a substantially homogeneous powder mixture and a portion of the substantially homogeneous powder mixture is formed into a green body. The body is fired to a first temperature, wherein substantially all surface oxide impurities are reduced and/or volatilized to substantially eliminate oxides from the green body, and the body is heated to a second temperature and sintered to yield a composite body of at least about 99 percent theoretical density and characterized by SiC whisker-like inclusions distributed substantially evenly in a ZrB2 matrix.

Abstract: A precursor formulation of a silicon carbide material that includes a ceramic material and a boron-11 compound. The ceramic material may include silicon and carbon and, optionally, oxygen, nitrogen, titanium, zirconium, aluminum, or mixtures thereof. The boron-11 compound may be a boron-11 isotope of boron oxide, boron hydride, boron hydroxide, boron carbide, boron nitride, boron trichloride, boron trifluoride, boron metal, or mixtures thereof. A material for use in a nuclear reactor component is also disclosed, as are such components, as well as a method of producing the material.