Mainstream Engineering Corporation

Other

Justin J Hill

Brian P Tucker

Robert P Scaringe

Joshua D Sole

Gregory E Chester

Ryan D Reeves

Thomas M Lasko

Anna P Skinner

Ted J Amundsen

Philip Cox

Kayla S O'Neill

Rachna C Igwe

Paul E Yelvington

Nicholas R Schwartz

Dustin J Zastrow

Adam J Duzik

Jesse A Johnson, Ii

Katherine Nicol

A high-throughput method for identifying single crystal hexagonal-SiC off-axis surfaces that support surface chemistries and kinetics to selectively produce various epitaxial growth modes of the metastable 3C-SiC polytype is provided. In execution of the aforementioned method, the present invention also encompasses the use of a single crystal hexagonal-SiC domed substrate, and a method for manufacturing thereof. Said method for screening silicon carbide growth surfaces is comprised of: fabrication of a silicon carbide domed substrate; forming a step-terrace growth surface on the domed surface of said silicon carbide domed substrate by hydrogen etching; performing silicon carbide deposition upon said growth surface, thereby creating an silicon carbide epitaxial domed wafer; and characterization of said silicon carbide epitaxial domed wafer. Silicon carbide deposition upon a silicon carbide domed growth surface allows for the modulation of the supersaturation ratio under a single set of growth conditions. There is provided a method to select a specific off-cut angle and orientation for a silicon carbide substrate that can be used to selectively and homogeneously grow a targeted 3C-silicon carbide microstructure best suited for the intended application.

Controlled surface chemistry for polytypic and microstructural selective growth on hexagonal SiC substrates

The present invention is an apparatus for curing composites out-of-autoclave and out-of-oven. The apparatus is a multilayered composite tool for shaping and curing composites. It also contains a sealant layer and composite resistive heating element on the tool's surface. This heating element provides heat to the composites during cure while binding it to the other layers, eliminating the need for external heat from autoclave and oven sources. A ceramic layer is applied to the top surface of the resistive heater for electrical insulation, heater protection and to provide a smooth surface for finish for the composite components being processed with the invention. A method for using the invention is also described. Finally, one embodiment of the invention is presented where a negative composite tool is created to apply additional pressure to the composite component during curing. This additional pressure enables the current invention to more closely mimic autoclave composite processing.

Carbon nanotube heater composite tooling apparatus and method of use

A window assembly heat transfer system is disclosed in which a window member has a selected transparency to monitored or sensed electromagnetic wavelengths. One or more passages are provided in the window member for flowing a single-phase or two-phase heat transfer fluid. A mechanism allows either evaporation or condensation of the fluid and/or balancing of a flow of the fluid within the passages. In one embodiment, the window assembly can be made by producing passages in a top surface of a first single plate, optionally producing passages in a bottom surface of a second single plate and bonding the top surface of the first plate to a bottom surface of a second single plate to form the window member with the passage or passages. In another embodiment, the window assembly can be made by providing a core around which the window member material is grown and thereafter removing the core to produce the passage or passages.

Advanced cooling system using throttled internal cooling passage flow for a window assembly, and methods of fabrication and use thereof

A process is disclosed for cooling a material that includes semiconductor nanoparticles in matrix material by anti-Stokes up-conversion. The semiconductor nanoparticle matrix is irradiated by a laser with a photonic wavelength matched to the anti-Stokes photoluminescence of the semiconductor nanoparticle bandgap. The semiconductor nanoparticles absorb the laser photon and phonons (heat) from lattice vibrations to photoluminescence photons with higher energy than the photon that were absorbed. A net cooling effect is generated from the lower energy and lower temperature in the material after anti-Stoke up-conversion.

Method for optical cooling through semiconductor nanoparticle anti-stokes photoluminescence

Method for optical cooling through semiconductor nanoparticle anti-stokes photoluminescene

A method encapsulates nanoscale material by producing a suspension of the nanostructure material in a first solvent using a micelle surrounding the nanostructure material. The micelle surrounding the suspended nanostructure material is swollen by adding to and mixing with the suspension an immiscible phase second solvent containing a precursor. The precursor is then reduced by adding a reducing reactant selectively soluble in the first solvent that reacts to the precursor containing reactant selectively solvated in the second solvent to encapsulate the nanostructure material. A metal-nanostructure composite can be provided by collecting and mixing the metal-shell encapsulated nanostructure product produced by the aforementioned method into a metal matrix.

Metal-encapsulated carbon nanotubes and method for producding such carbon nanotubes via solvent shell reactions with metallic ions

A window assembly heat transfer system is disclosed in which a window member has a selected transparency to monitored or sensed light wavelengths. One or more passages are provided in the window member for flowing a single-phase or two-phase heat transfer fluid, the passages being optically non-transparent to the monitored or sensed light wavelengths. A mechanism allows either evaporation or condensation of the fluid and/or balancing of a flow of the fluid within the passages. In one embodiment, the window assembly can be made by producing passages in a top surface of a first single plate, optionally producing passages in a bottom surface of a second single plate and bonding the top surface of the first plate to a bottom surface of a second single plate to form the window member with the passage or passages. In another embodiment, the window assembly can be made by providing a core around which the window member material is grown and thereafter removing the core to produce the passage or passages.

Method for optical cooling through semiconductor nanoparticle anti-Stokes photoluminescene

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Merritt Island, FL, United States of America

Justin J Hill