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| Number | Title | Issue Date |
| 7419700 | Nanoparticle-modified carbon-ceramic brake discs Carbon-ceramic brake discs, the remaining porosity in which, after infiltration with a carbide-forming element and reaction of this element with at least part of the carbon in the preliminary body of the carbon-ceramic brake disc to form carbides, is at least partly... | 09/02/2008 |
| 7335397 | Pressure gradient CVI/CVD apparatus and method An apparatus and method for densifying porous structures inside a furnace using pressure gradient CVI/CVD. The apparatus includes a stack of porous structures where each porous structure has an aperture therethrough. The apparatus also includes at least one ring-lik... | 02/26/2008 |
| 7332195 | Chemical vapor deposition method Method for densifying a porous carbon preform (5). The method includes the steps of: (a) providing the apparatus (11); (b) charging the apparatus (11) with a plurality of stacks of annular porous carbon preforms (5), the preforms being se... | 02/19/2008 |
| 6953605 | Method for densifying porous substrates by chemical vapour infiltration with preheated gas A method for densification of porous by CVI in which substrates are loaded into a loading zone of an oven and heated to a temperature at which a desired matrix material is formed from a precursor gas(es). A reative gas containing the precursor gas(es) is admitted in... | 10/11/2005 |
| 6942893 | Densifying hollow porous substrates by chemical vapor infiltration A porous substrate having a concave inside face and an outside face is disposed in an enclosure, and reactive gas is introduced into the enclosure to densify the substrate. At least a portion of the gas is divided into two non-zero fractions. The first fraction of t... | 09/13/2005 |
| 6926925 | Method of making a continuous coating on the surface of a part A method and apparatus for a continuous coating of a part may include providing a separation layer made of a material that is weaker than the material of the coating to be made. The part may be placed on one or more supports, the supports coated with the separation ... | 08/09/2005 |
| 6780462 | Pressure gradient CVI/CVD process The invention relates to pressure gradient processes for forcing infiltration of a reactant gas into a porous structure. The process comprises the steps of partially densifying a porous structure with a pressure gradient CVI/CVD process in which a first potion of th... | 08/24/2004 |
| 6723382 | Method for fabricating ceramic matrix composite A method for fabricating a CMC (Ceramic Matrix Composite) article, comprising: performing a CVI (Chemical Vapor Infiltration) treatment for forming a SiC matrix layer on the surface of a woven fabric; performing a machining process, after the CVI treatment, for mach... | 04/20/2004 |
| 6669988 | Hardware assembly for CVI/CVD processes A hardware assembly is provided for controlling a first portion of gas and a second portion of gas in a furnace. The first portion of the gas is introduced to a center opening region of a stack of porous structures. The second portion of the gas is introd... | 12/30/2003 |
| 6630202 | CVD treatment of hard friction coated steam line plug grips Method of treating a surface of a steam line plug grip wherein the surface is subjected to chemical vapor deposition (CVD) treatment to introduce a hard oxide material into pores and cracks in the surface.... | 10/07/2003 |
| 6610227 | Method of manufacturing fiber reinforced composite member A manufacturing method of a fiber reinforced composite member includes the steps of: forming a fabric 1 on the surface of a mandrel 10, infiltrating the formed fabric with matrix, and leaving portions 12a, 12b of the mandrel as integral with the fabric an... | 08/26/2003 |
| 6607782 | Methods of making and using cubic boron nitride composition, coating and articles made therefrom Methods for coating a substrate and methods of shaping a workpiece comprise formation and use, respectively, of a surface or substrate comprising a first phase selected from nitrides, carbides. carbonitrides, borides, sulphides, chalcogenides, oxides, and... | 08/19/2003 |
| 6383298 | Method and apparatus for pressure measurement in a CVI/CVD furnace An apparatus to determine the pressure within the furnace during thermal gradient forced flow processes as well as other CVI/CVD processes is disclosed. Further, a method to measure the pressure is also described.... | 05/07/2002 |
| 6342269 | Method for manufacturing ceramic-based composite material A matrix formation process 10 is configured with CVI process 12 and PIP process 14, 15, 16 in which a co-polymer containing at least polycarboxysilane (PCS) and polymethylsilane (PMS) is applied. Crosslinking of each polymer is performed at an intermediat... | 01/29/2002 |
| 6309702 | Process for the production of improved boron coatings Improved articles of manufacture are disclosed, together with methods for preparing such articles, whereby the surface of a graphite or comparable substrate is first densified with carbon to reduce surface porosity while still retaining sufficient surface... | 10/30/2001 |
| 6197374 | Method for chemical vapor infiltration of refractory substances, especially carbon and silicon carbide A method for isothermic, isobaric chemical vapor infiltration (CVI) of refractory substances, especially of carbon (C) and silicon carbide (SiC), based on diffusion in a porous structure, whereby the pressure of the gas or partial pressure of an educt gas... | 03/06/2001 |
| 6187379 | Fluidized bed coating process with liquid reagent A preferred embodiment of a method for coating a substrate with a chemical compound uses a precursor liquid. This precursor liquid preferably serves as a reagent in the coating process and is housed in a reactor. Once the precursor liquid is placed in the... | 02/13/2001 |
| 5747096 | Method for measuring the depositions, densification of etching rate of an electrically conductive body A method for determining the instantaneous and cumulative mass rate of change of a conductive body in a deposition, densification or etching process through the use of a gaseous, liquid or particulate solids precursor. In one application, porous solid str... | 05/05/1998 |
| 5681511 | Hermetic ceramic composite structures Methods for making hermetic silicon carbide matrix composite structures by CVI. A fibrous preform is created by winding strands of yarn of refractory fiber material helically about a graphite mandrel. Impregnation of the preform is carried out in a subatm... | 10/28/1997 |
| 5652030 | Vapor phase chemical infiltration process of a material into a porous substrate at controlled surface temperature The substrate (10) is placed in an enclosure (12) and is heated so as to establish therein a temperature gradient such that the substrate has a higher temperature in portions that are remote from its exposed surfaces than at its exposed surfaces. A reacti... | 07/29/1997 |
| 5552220 | Method of manufacturing a composite material having a pyrolytic carbon interphase of lamellar microtexture between reinforcing fibers and a matrix, and a material as obtained by the method The pyrolytic carbon lamellar interphase is formed on the reinforcing fibers inside a chamber in which a plurality of successive cycles is performed, each cycle comprising: injecting a reaction gas in which the pyrolytic carbon precursor is selected from ... | 09/03/1996 |
| 5527747 | Rapid process for the preparation of diamond articles A rapid process for the preparation of diamond articles in which a porous, dense preform of diamond particles created by particle packing methods is subjected to forced flow chemical vapor infiltration of a carbon containing reagent gas resulting in the p... | 06/18/1996 |
| 5476685 | Process for the manufacture of a fiber reinforced composite material having a ceramic matrix and preheated carbon fibers In a process according to the invention, before a carbon/fiber ceramic matrix is densified, the carbon fiber reinforcement material is subjected to a thermal treatment in a non-oxidizing environment at a temperature greater than 1300° C. and less than 22... | 12/19/1995 |
| 5441762 | Coating a composite article by applying a porous particulate layer and densifying the layer by subsequently applying a ceramic layer Carbon or ceramic matrix composites are protected from oxidation at high temperatures by a layer formed from a mixture of solid particles in a binder which is cured and then coated with ceramic material by chemical vapor infiltration.... | 08/15/1995 |
| 5411763 | Method of making a modified ceramic-ceramic composite The present invention provides a method of making a shaped ceramic-ceramic composite articles, such as gas-fired radiant heat burner tubes, heat exchangers, flame dispersers, and other furnace elements, having a formed-on ceramic-ceramic composite thereon... | 05/02/1995 |
| 5389400 | Method for making a diamond/carbon/carbon composite useful as an integral dielectric heat sink A method for producing a diamond/carbon/carbon composite is provided which includes the steps of densifying a preform of interwoven vapor grown carbon fibers form a carbon/carbon composite, and then depositing a polycrystalline diamond film on the carbon/... | 02/14/1995 |
| 5382453 | Method of manufacturing a hollow silicon carbide fiber reinforced silicon carbide matrix component Carbon coated carbide fibers are arranged in a predetermined pattern and shape around a silicon carbide coated graphite insert. Silicon carbide is infiltrated into the silicon carbide fibers to produce a SiC/SiC composite component. The SiC/SiC composite ... | 01/17/1995 |
| 5348774 | Method of rapidly densifying a porous structure Porous solid bodies, especially carbon bodies, are densified by chemical vapor deposition by establishing a thermal gradient within the body, thermally decomposing a gaseous precursor so deposit an electrically and thermally conductive deposit (e.g. carbo... | 09/20/1994 |
| 5312679 | Nickel catalyzed carbon infiltration of carbon fiber substrates A catalytic carbon formation technique in a carbon fiber substrate is disclosed. The carbon fiber substrate is first impregnated with a catalyst and is thereafter heated in an atmosphere rich in carbon and hydrogen. The catalyst is typically a Group VIII ... | 05/17/1994 |
| 5300322 | Molybdenum enhanced low-temperature deposition of crystalline silicon nitride A process for chemical vapor deposition of crystalline silicon nitride which comprises the steps of: introducing a mixture of a silicon source, a molybdenum source, a nitrogen source, and a hydrogen source into a vessel containing a suitable substrate; an... | 04/05/1994 |
| 5298287 | Method of making CVD Si3 N4 CVD Si3 N4 can be made by placing a substrate (2) inside a CVD reactor (4) having an interior and interior walls (6). The interior walls of the reactor are include a high temperature metal selected from the group consisting of Mo, Nb... | 03/29/1994 |
| 5202158 | Apparatus for and method of producing high density fiber reinforced composite material An apparatus and a method of producing a high density fiber reinforced composite material operate for lowering the porosity of a porous fiber reinforced composite material. A large number of particles arranged in a reaction tube are pushed up by the press... | 04/13/1993 |
| 5160471 | Process for manufacturing a thermostructural composite by chemical vapor deposition using linking threads A fibrous preform (10) of the component to be manufactured is conformed in the desired shape with the desired degree of compacting, prior to densification by chemical vapor deposition. The conformation is achieved by linking the preform (10) onto a rigid ... | 11/03/1992 |
| 5154948 | Method for shaping a fibrous reinforcement texture used in the manufacture of a composite material part The shaping of the fibrous texture is at least partly achieved by applying a deformable layer or strip, such as a cloth, made from a material having a thermal expansion coefficient different from that of the material constituting the fibrous texture. The ... | 10/13/1992 |
| 5141775 | Method for the manufacture of a composite material part The invention relates to the manufacture of a composite material part by shaping a fibrous reinforcement texture and densifying the texture by chemical vapor infiltration of the material constituting the matrix of the composite through the porosity of the... | 08/25/1992 |
| 5079039 | Method for producing a ceramic matrix composite material having improved toughness A porous structure made of refractory fibers or densified by carrying out a sequential deposition of a matrix, the deposition comprising at least two chemical vapor infiltration phases of an essentially ceramic material separated by a chemical vapor infil... | 01/07/1992 |
| 5045356 | Process for producing carbon/carbon composite having oxidation resistance A carbon/carbon composite having oxidation resistance is produced by filling the voids of a carbon/carbon composite comprising 10-70% by volume of carbon fibers and 5-90% by volume of a carbonaceous matrix and having a void percentage of 10-55%, with at l... | 09/03/1991 |
| 5034172 | Process for the manufacture of composite components comprising a web and a reinforcement structure A process relating to the manufacture of a composite component comprising a web and a reinforcement structure. The process includes providing a profiled section constituting a fibrous structure that is rigidified by impregnation with a thermoformable bind... | 07/23/1991 |
| 4980202 | CVD SiC matrix composites containing carbon coated fibers Chemical vapor deposition (CVD) techniques for forming tough silicon carbide (SiC) matrix composites. The introduction of methyldichlorosilane (MDS) to a reactor containing a fiber preform which been flushed with a noble gas, causes the formation of a car... | 12/25/1990 |
| 4929328 | Titanium diboride ceramic fiber composites for Hall-Heroult cells An improved cathode structure for Hall-Heroult cells for the electrolytic production of aluminum metal. This cathode structure is a preform fiber base material that is infiltrated with electrically conductive titanium diboride using chemical vapor infiltr... | 05/29/1990 |
