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5108729 Production of carbide products  
A method and apparatus are provided for producing a product comprising a carbide compound, such as for example silicon carbide. A reactor is provided which has a chamber defined therein which is...
5102646 Method of fabrication of ceramic powders  
The invention relates to a method of fabrication in the powdered state of ceramic compounds formed between a metalloid and a refractory metal, characterized in that it involves the following...
5093039 Highly pure sintered carbide with high electric conductivity and process of producing the same  
Disclosed is an electrically conductive sintered silicon carbide body having an electric resistivity of not higher than 1 Ωcm, which is produced by (a) mixing (1) a first silicon carbide powder...
5087433 Method and apparatus for the production of SiC whisker  
In the production of SiC whisker for composite materials such as FRP, FRM, FRC and the like by vapor phase synthesis between silicon sulfide and carbon compound, SiC whisker suitable for the...
5082872 Infusible preceramic polymers via ultraviolet treatment in the presence of a reactive gas  
A method is disclosed for the preparation of ceramic materials or articles by the pyrolysis of preceramic polysilanes wherein the preceramic polysilanes are rendered infusible prior to pyrolysis...
5080378 Silicon carbide sintered body for mechanical seal and mechanical seal using the same  
A silicon carbide sintered body for a mechanical seal which has independent pores having an average pore diameter of from 10 to 40 μm and a porosity of from 4 to 13 vol %. The mechanical seal...
5080879 Process for producing silicon carbide platelets and the platelets so produced  
A process for producing silicon carbide platelets and the platelets so produced. The process comprises reacting particles of a non-graphitizable form of hard carbon containing 0.5-1.5% by weight...
5078927 Process for making raw material bodies especially for the production of silicon or silicon alloys  
Raw material bodies such as briquettes, for use in the production of silicon or silicon alloys, are formed by mixing a pitch and caking coal at a temperature above 100° C. and up to 200° C. to...
5079195 Method of preparing refractory silicon carbide composites and coatings  
A carbonaceous preform is infiltrated with a silicon melt alloyed with at least one element which is substantially insoluble in silicon carbide and which forms refractory phases. The resulting...
5070049 Starting composition for the production of silicon carbide and method of producing the same  
In the production of silicon carbide, a starting composition comprising silicon dioxide powder and a carbonaceous substance and having a bulk density of 0.2 to 2.0 g/cm3 is used, wherein the...
5037626 Process for producing silicon carbide whiskers using seeding agent  
A processing for producing silicon carbide whiskers in which a source of silica is mixed with a residual oil or crude petroleum and the resultant mixture is heated in a substantially nonoxidizing...
5021230 Method of making silicon carbide  
A process for production of high purity, sub-micron size, silicon carbide by reacting a mixture of silica powder and carbon powder in a mixing reactor. The reactor, initially pressurized with a...
5017525 Production of ceramic materials and of precursor therefor  
A process for the production of a precursor which is a polymeric material comprising at least one metallic or non-metallic element, oxygen and carbon and from which a ceramic material, e.g. a...
5010043 Production of diamond compacts consisting essentially of diamond crystals bonded by silicon carbide  
A process for producing a diamond compact comprised of diamond crystals bonded mainly by silicon carbide. The diamond crystals are intimately mixed with silicon in the proportions 97 to 65 percent...
5002905 Hexagonal silicon carbide platelets and preforms and methods for making and using same  
Crystalline silicon carbide wherein at least 90 weight percent of the silicon carbide is formed from a plurality of hexagonal crystal lattices wherein at least 80 weight percent of the crystals...
4996174 Production of ceramic materials  
Process for production of a ceramic material, e.g. a carbide, nitride, boride or silicide, by reacting at least one compound of a metallic or non-metallic element having two or more goups reactive...
4985382 Improved ceramic composite structure comprising dross  
The invention relates to ceramic composite articles formed by infiltration of a particulate, permeable bed or permeable preform with a polycrystalline matrix a metal-oxidant reaction product. The...
4981666 Method for the preparation of silicon carbide whiskers  
In place of the conventional silicon source materials used in the prior art method for the preparation of silicon carbide whiskers, the inventive method utilizes a hydrolysis product of a...
4975392 Method for manufacturing silicon carbide whisker  
A method for manufacturing silicon carbide whisker which has a cross-sectional diameter of greater than about 1 μm by mixing a source of silicon atom in the form of grains having a mean grain...
4963286 Dispersions of silica in carbon and a method of making such dispersions  
Silicon carbide is produced by a method which includes dispersing silica in a residual oil, carbonizing the oil at elevated temperatures, and heating the carbonized dispersion to form silicon...
4957811 Components of silicon-infiltrated silicon carbide having a porous surface, and process for the production thereof  
For producing a component of silicon-infiltrated silicon carbide, having a porous sliding surface, a component of silicon-infiltrated silicon carbide (composition: 40-95% by weight of SiC, 1-45%...
4948762 Process for the preparation of finely divided carbides and nitrides from ceramic precursor-compounds  
Carbides, nitrides or carbonitrides of elements from the main groups III and IV and sub-groups III, IV, V and VI of the periodic system of elements are prepared by (i) reacting compounds of the...
4948573 Process for producing silicon carbide and metal carbides  
A process for forming carbides of silicon or metals in fine powder or whisker form. The process comprises forming a substantially uniform and non-agglomerated dispersion of a microfine powder of...
4923716 Chemical vapor desposition of silicon carbide  
Silicon carbide is deposted by chemical vapor deposition from a vapor source having a single molecular species that provides both the silicon and the carbon. The molecular species has the...
4917866 Production process of silicon carbide short fibers  
A process for producing silicon carbide short fibers comprises oxidizing metallic silicon powder in an oxidizing gas atmosphere into silicon monoxide in the form of ultrafine particles or gas, and...
4915924 Method of preparing whiskers of silicon carbide and other materials  
A method of producing whiskers of silicon carbide and other materials. For the formation of silicon carbide, the method involves forming a first reaction zone containing microfine particles of...
4906324 Method for the preparation of silicon carbide platelets  
A method for producing a high yield of free-flowing alpha-phase single crystal silicon carbide platelets. Through the use of various parameter and composition values, the size range of the...
4904622 Process for the preparation of silicon carbide whiskers  
The invention relates to a process for the preparation of silicon carbide whiskers by the reaction, in a non-oxidizing atmosphere, at a temperature of at least 1300° C., of a charge composed of a...
4900525 Chemical vapor deposition reactor for producing metal carbide or nitride whiskers  
A reactor for producing single crystal metal carbide, nitride, or carbonitride whiskers, where the metal is one or more of Ti, Zr, Hf, Nb, Ta or W. The reactor walls and inner fixtures provide the...
4900531 Converting a carbon preform object to a silicon carbide object  
A process for converting in depth a carbon or graphite preform object to a silicon carbide object, silicon carbide/silicon object, silicon carbide/carbon-core object, or a silicon...
4889904 Process for the preparation of methylpolysilanes having controlled carbon content  
A process for the preparation of a methylpolysilane having a controlled carbon content is provided which includes the steps of heating together to form a reaction mixture at leasdt one...
4886652 Production of metal carbides  
Production of carbide shapes of silicon, titanium or vanadium by reaction of carbon with the metal in liquid phase such being carried out by heating a mixture of particles of carbon and particles...
4877596 Process for the production of low carbon silicon  
Silicon having a low carbon content is produced by removing carbon from molten silicon by heating the molten silicon to temperatures of 1420° to 1900° C. and establishing a temperature gradient of...
4873070 Process for producing silicon carbide whiskers  
A process for producing silicon carbide whiskers by heating a react solid silicon-containing starting material and carbon-containing starting material in a reaction vessel, wherein a molding...
4873069 Method for the preparation of silicon carbide whiskers  
A method for achieving a high yield of beta silicon carbide whiskers. According to this method, very small (e.g., 0.002 microns) fluffy silicon dioxide particles having a very large surface area...
4869886 Processes for producing a high density silicon carbide sinter  
Silicon carbide particles are produced by reacting a gaseous silicon compound or granular silicon with a carbon compound at a high temperature. In the reaction, the amount of free carbon content...
4855119 Method of manufacturing silicon carbide whisker  
A method for manufacturing a silicon carbide whisker comprising heating a reaction zone to a temperature in the range of 1,000° C. to 1,200°; supplying a reducing or inactive gas and a...
4853299 Silicon carbide sintered body and method of manufacturing the same  
A silicon carbide sintered body containing not less than 0.03% by weight of boron, a total of not more than 0.3% by weight of metallic element impurities including the boron, not more than 1.0% by...
4853352 Method of making self-supporting ceramic materials and materials made thereby  
A method to produce an article of commerce comprising a self-supporting ceramic body by oxidation of a molten parent metal with a vapor-phase oxidant, includes applying to a surface of the parent...
4851203 Metal carbide and nitride powders  
Metal carbide and metal nitride powders produced by the carbothermal reduction of one or more metal oxides reacted with a binder material and a carbonaceous additive or optionally, a binder...
4849196 Process for producing silicon carbide whiskers  
The present invention provides a process for producing silicon carbide whiskers by reacting a starting mixture comprising starting silicon source material mainly composed of silicon and oxygen and...
4842840 Method for production of oxidation-resistant sialon and silicon carbide materials  
An oxidation-resistant sialon material and an oxidation-resistant silicon carbide material each containing a phase of closely packed crystals in the surface region are produced by coating a sialon...
4840781 Process for producing a silicon carbide  
A process for producing silicon carbide in the form of uniform fine particles and having a high purity with a good efficiency is provided, which process comprises subjecting an organosilicon...
4839150 Production of silicon carbide  
Silicon carbide is produced by a method which includes dipsersing silica in a residual oil, carbonizing the oil at elevated temperatures, and heating the carbonized dispersion to form silicon...
4836956 Extraction of polyvalent metals with organodiphosphonic acids  
Polyvalent cations (e.g., U(IV), Fe(III) can be extracted from aqueous solution using novel organophosphorus compounds of the formulas: ##STR1## wherein R1 and R2 are the same or different and are...
4837230 Structural ceramic materials having refractory interface layers  
Ceramic composite articles having high flexural and tensile strength are produced by introducing multiple layers of a ceramic matrix material onto a ceramic reinforcement fabric. Crack propagation...
4832929 Process for producing a silicon carbide powder  
Silicon carbide particles are produced by reacting a gaseous silicon compound or granular silicon with a carbon compound at a high temperature. In the reaction, the amount of free carbon content...
4828814 Process for purification of solid material  
A process is disclosed for producing a solid material which, in some cases, may have a resultant purity of 99.999% or better which comprises contacting the solid material at a temperature...
4824651 Process for preparing silicon carbide fibers  
A process for preparing silicon carbide fibers, which comprises spinning a copolymer obtained by reacting at least one disilane of the formula R2 R1 Si2 (OCH3)3in which R represents the same or...
4818511 Process and apparatus for producing non-oxide compounds  
A process for producing non-oxide compounds such as silicon nitride and silicon carbide by using a multi-stage apparatus constructed of a raw material drier section, a reactor section including a...

Matches 201 - 250 out of 450 < 1 2 3 4 5 6 7 8 9 >