Abstract: Matrix composite component repair processes are disclosed. The matrix composite repair process includes applying a repair material to a matrix composite component, securing the repair material to the matrix composite component with an external securing mechanism and curing the repair material to bond the repair material to the matrix composite component during the securing by the external securing mechanism. The matrix composite component is selected from the group consisting of a ceramic matrix composite, a polymer matrix composite, and a metal matrix composite. In another embodiment, the repair process includes applying a partially-cured repair material to a matrix composite component, and curing the repair material to bond the repair material to the matrix composite component, an external securing mechanism securing the repair material throughout a curing period, In another embodiment, the external securing mechanism is consumed or decomposed during the repair process.

Abstract: Embodiments of the disclosure include systems and methods for providing a flow of purge air and an adjustable flow of cooling air to a wheel space cavity or a stator cavity. According to one embodiment, there is disclosed a turbine assembly. The turbine assembly may include a rotor assembly, a stator assembly positioned adjacent to the rotor assembly, and a wheel space cavity formed between the rotor assembly and the stator assembly. At least one fixed purge air orifice may be associated with the stator assembly. The fixed purge air orifice may be configured to provide a flow of purge air to the wheel space cavity. Moreover, at least one adjustable cooling air orifice may be associated with the stator assembly. The at least one adjustable cooling air orifice may be configured to provide a flow of cooling air to the wheel space cavity.

Abstract: A method for manufacturing a solid oxide electrochemical device comprising disposing electrolyte between a first electrode and a second electrode, applying a bonding agent between the first electrode and a first interconnect, applying a sealing agent between the first electrode and the first interconnect, disposing a second interconnect adjacent to the second electrode, heating the first interconnect, the first electrode, the electrolyte, the second electrode, the second interconnect, the bonding agent, and the sealing agent to at least one intermediate temperature for at least one intermediate length of time, and then to a curing temperature, for a curing time, effective to bond and seal the first electrode to the first interconnect, wherein the at least one intermediate temperature is less than the curing temperature.

Abstract: The exhaust within an exhaust gas recirculation (EGR) system should be purged to allow for access to the components of the EGR system. A system and method for purging the EGR system is provided. The system and method may incorporate a purge gas supply that may include: at least one pressurized cylinder, a storage tank, a compressor, or a benign fluid source. The system and method may drive the exhaust out of the EGR system.

Abstract: While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Abstract: The exhaust within an exhaust gas recirculation (EGR) system should be purged to allow for access to the components of the EGR system. A system and method for purging the EGR system is provided. The system and method may incorporate a purge gas supply that may include: at least one pressurized cylinder, a storage tank, a compressor, or a benign fluid source. The system and method may drive the exhaust out of the EGR system.

Abstract: A flowfield plate for an electrochemical cell includes a plenum in fluid connection with a reactant fluid inlet and flow channels in fluid connection with a fluid outlet for draining waste fluids and gases from the electrochemical cell. The flowfield plate further includes lands extending between the plenum and face of the flowfield plate with holes extending through the lands, which place the plenum in fluid connection with the face of the flowfield plate. The plenum receives reactant fluid and distributes it evenly throughout the plenum to the holes. The holes are substantially perpendicular to the face of the flowfield plate, which is adjacent to the gas diffusion layer of the electrochemical cell, so that reactant fluid is delivered to the gas diffusion layer in such a way that the reactant fluid has a velocity component perpendicular to the surface of the gas diffusion layer.

Abstract: This invention discloses regeneration methods to remove carbon monoxide (CO) from reformate fuel using an adsorption and electro-catalytic oxidation (ECO) approach. One method of the invention comprises a first ECO cell and a second ECO cell, and the other method comprises a first ECO cell and a first charge storage device. Both methods eliminate the requirement of an external power supply that leads to higher cost, additional power consumption and more processor complexity for the CO removal processor.

Abstract: The invention provides devices and techniques for reducing or eliminating fuel crossover from the anode to the cathode in fuel cells using organic fuels. The invention particularly provides proton exchange membranes having passages or channels with or without a catalyst layer active for the electrochemical oxidation of a fuel. The invention reduces fuel crossover by providing void spaces within the membrane where the fuel may be sequestered as it diffuses through the membrane from the anode to the cathode. The sequestered fuel may be removed physically and/or electrochemically. The invention provides for physical removal of the sequestered fuel by means of flowing a gas stream or a liquid stream through the passages thus evacuating the fuel before it diffuses to the cathode.

Abstract: The present invention provides a lightweight fuel cell system that operates with fuel and oxidant gases at near atmospheric pressures. The fuel cell system uses a monopolar cell design where the electrode surfaces are sufficiently accessible to the gases that it is not necessary for the oxidizer and reducer gases to be compressed. The fuel cell is ideal for personal use due to its light weight, compact size and self contained operation. An added feature of the present invention is that individual fuel cells may be linked together to achieve greater voltages or currents.

Abstract: Coating formulations which behave as elastic solids having reversible stress-induced fluidity are prepared by creating a fluid having distributed therein effective amounts of ionic charge sites and countercharge sites. For instance, elastic solids having reversible stress-induced fluidity are prepared by combining liquid formulations with a dispersion of a small, but effective, amount of at least one crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, where n is 1 or more, (m+2d+3+n.multidot.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration, if any.