Patent application number | Description | Published |
20090030142 | PRECERAMIC SILAZANE POLYMER FOR CERAMIC MATERIALS - A method of forming a preceramic polymer includes treating a silane precursor having a vinyl moiety of ammonia to produce the preceramic polymer. For example, the silane precursor is trichlorovinylsilane. The preceramic polymer may then be cross-linked at a relatively low temperature by using a cross-linking agent. | 01-29-2009 |
20090197075 | COATINGS AND COATING PROCESSES FOR MOLYBDENUM SUBSTRATES - In a method for coating a molybdenum-based substrate, a molybdenum disilicide layer is formed on the substrate. Aluminum is reacted with hydrochloric gas to produce aluminum chloride. The aluminum chloride is reacted with hydrogen and carbon dioxide to produce alumina. A layer of the alumina is deposited atop the molybdenum disilicide layer. | 08-06-2009 |
20110071013 | CERAMIC MATRIX COMPOSITE SYSTEM AND METHOD OF MANUFACTURE - A ceramic matrix composite is formed from a non-oxide ceramic and continuous ceramic fibers. The matrix includes a hafnium donor in the matrix in an amount sufficient to harden the composite at elevated temperatures to prevent ablation of the composite. The matrix also includes a boron donor in the matrix in an amount sufficient to lower the glass transition temperature of the composite to flow over cracks formed in the composite. The method to form the matrix is selected from polymer infiltration pyrolysis, chemical vapor infiltration, and sequential polymer infiltration pyrolysis and chemical vapor infiltration. | 03-24-2011 |
20110071014 | HYBRED POLYMER CVI COMPOSITES - A method of forming a highly densified chemical matrix composite CMC from a preform of a matrix of a non-oxide ceramic and continuous ceramic fibers. An interface coating is added, followed by partially densifying the preform with a resin to increase the density of the preform using a polymer infiltration pyrolysis PIP) process one or more times. A chemical vapor infiltration (CVI) process is used to bring the CMC to a final desired density. | 03-24-2011 |
20110177318 | CERAMIC COMPOSITE ARTICLE AND METHOD THEREFOR - A ceramic composite article includes ceramic reinforcement fibers each having an outer surface and a continuous zinc oxide coating disposed on the ceramic reinforcement fibers and in contact with the outer surfaces. | 07-21-2011 |
20120082832 | COMPOSITE ARTICLE AND METHOD THEREFOR - A composite article includes a substrate and a multilayer coating on the substrate. The multilayer coating includes an inner layer near the substrate, and outermost layer on the inner layer, and an intermediate layer between the inner layer and the outermost layer. The inner layer and outermost layer are boron-containing materials, and the intermediate layer is a silicon-containing ceramic material. | 04-05-2012 |
20120251805 | COMPOSITE ARTICLE AND METHOD THEREFOR - A composite article includes a substrate and a multilayer coating on the substrate. The multilayer coating includes an inner layer near the substrate, and outermost layer on the inner layer, and an intermediate layer between the inner layer and the outermost layer. The inner layer and outermost layer are boron-containing materials, and the intermediate layer is a silicon-containing ceramic material. | 10-04-2012 |
20130022826 | CERAMIC COMPOSITE ARTICLE HAVING LAMINAR CERAMIC MATRIX - A ceramic composite article includes ceramic carbide fibers and a ceramic matrix in which the ceramic carbide fibers are embedded. The ceramic matrix includes a laminar structure with at least one layer of a first ceramic material and at least one layer of a second, different ceramic material. | 01-24-2013 |
20130082426 | METHOD FOR FABRICATING CERAMIC MATERIAL - A method for a fabricating a ceramic material includes providing a mixture of a reactive metallic filler material with a preceramic polysilazane material. The preceramic polysilazane material is then polymerized to form a green body. The green body is then thermally treated in an environment that is substantially free of oxygen to convert the polymerized preceramic polysilazane material into a ceramic material that includes at least one nitride phase that is a reaction product of the reactive metallic filler material and a preceramic polysilazane material. | 04-04-2013 |
20130323417 | HYBRED POLYMER CVI COMPOSITES - A method of forming a highly densified chemical matrix composite CMC from a preform of a matrix of a non-oxide ceramic and continuous ceramic fibers. An interface coating is added, followed by partially densifying the preform with a resin to increase the density of the preform using a polymer infiltration pyrolysis PIP) process one or more times. A chemical vapor infiltration (CVI) process is used to bring the CMC to a final desired density. | 12-05-2013 |
20140178244 | GASEOUS BASED DESULFURIZATION OF ALLOYS - A method for desulfurizing a metal alloy comprises heating the metal alloy to a molten state. A gaseous desulfurizing compound is bubbled through the molten alloy to form a solid sulfur-containing waste phase and a molten reduced-sulfur alloy phase. The solid waste phase and the molten reduced-sulfur alloy phase are separated. The gaseous desulfurizing compound includes a constituent element selected from the group: alkali metals, alkaline earth metals, and rare earth metals. | 06-26-2014 |