Abstract:… for future hypersonic vehicles As this application is structural, a strong degree of damage tolerance is desired, and thus ceramic matrix composites
are the primary choice due to the desire for reduced weight, high temperature strength and oxidation resistance. Silicon … more
Abstract:ABSTRACT: The current designs of telescopes for space borne applications use monolithic glass, beryllium, or silicon-carbide optics. With that existing optical technology, it is increasingly difficult or impossible to meet the new goals and requirements of AF, ORS, and other… more
Abstract:… sensing mechanism. Currently, platinum or platinum alloys are used as electrode materials. However, the high cost of platinum is a major cost driver for MET sensors. The new electrode assemblies will comprise a composite structure of glassy carbon electrodes and silicon … more
Abstract:Optical Physics Company (OPC) has developed new silicon carbide (SiC) foam-based optics with hybrid skins that are composite, athermal and lightweight (FOCAL) that provide an enabling capability for performing NASA space missions that will require 2 to 3… more
Abstract:… metal liner provides known compatibility with propellants, such as HAN, and a reliable, hermetic seal enabling the use of light weight carbon composites. The metal lined carbon composite chambers are 90% lighter than metallic chambers and weight equivalent to carbon silicon… more
Abstract:The outstanding properties of silicon carbide (SiC) include excellent specific strength, extreme chemical resistance, tremendous hardness, and retention of its high strength at very high temperatures. The brittleness typically associated with a ceramic can be… more
Abstract:This SBIR Phase I program will identify the joining materials and demonstrate the processes that are suited for construction of advanced ceramic matrix composite (CMC) thrusters for advanced monopropellants and bipropellants for space propulsion. We will join CMCs to each other and to superalloys… more
Abstract:ABSTRACT: Availability of high quality, large area gallium nitride (GaN) single crystal substrates is one of the most outstanding issues for III-V nitride materials. Today's GaN device processes typically employ HVPE grown on sapphire and silicon … more
Abstract:A problem perceived for Trex Enterprises chemical vapor composite silicon carbide CVC SiC<SUP>TM</SUP> mirrors is the cost associated with machining and lightweighting the mirrors. Indeed these processes are labor, schedule, risk and cost drivers… more
Abstract:Trex Enterprises Corporation (Trex) proposes technology development to manufacture monolithic, lightweight silicon carbide corrugated mirrors (SCCM) suitable for NASA space telescopes. The manufacturing process for SCCM integrates Trex's patented CVC… more
Abstract:MDA, Raytheon and other DoD components are interested in Dimensionally Stable and Survivable Silicon Carbide Telescopes for the next generation of Space Tracking and Space Surveillance System (STSS). The requirements for the proposed athermal telescope are:… more
Abstract:…, timing jitter and turn on time (both typically greater than a few nanoseconds). Photoconductive Semiconductor Switches (PCSS) are one method of switching high voltages without requiring direct electrically-connected trigger systems. PCSS have been demonstrated using silicon… more
Abstract:… The integrity and lifetime of the magnet wire coating are therefore directly related to system performance and reliability. In previous work, Ultramet developed a rapid, low-cost method of applying oxide, nitride, and carbide interface coatings to carbon and silicon … more
Abstract:… single unit has the potential to minimize weight, complexity, and cost. Ultramet has developed a melt infiltration process for rapid fabrication of refractory ceramic matrix composites (CMC) including matrices of zirconium carbide (ZrC), hafnium carbide (HfC), silicon … more
Abstract:High-temperature smart sensors are desired for use in various harsh environment applications. Placing the sensing circuit close to the actual sensor would substantially reduce noise and interference problems and improve system reliability. If the circuits can operate at high temperature, this will… more
Abstract:… skirt will need to exhibit very high compressive strengths at ambient temperatures, and adequate structural properties at flight tem-peratures. Attractive materials include metallic-clad ceramics and composites made with large compression-resistant boron or silicon… more
Abstract:ABSTRACT: Lightweight silicon-based ceramics are leading candidates to replace heavier nickel-based superalloys for use on hot section components in next generation gas turbine engines having increased specific power. However, exposures of these materials to the high temperatures, pressures and… more
Abstract:…cation of downstream polishing processes.The Phase-1 effort will study of how the introduction of an ELID in-situ tool dressing technique can prevent or minimize the creation of mid and high spatial frequency surface features in the process of fabricating glass and Silicon … more
Abstract:… of cast aluminum alloys. To achieve these advantages in hyper-eutectic alloys, it is proposed to adjust the carbon and copper contents in the aluminum alloy during melt processing, and to precipitate during solidification equiaxed particles of primary silicon, … more
Abstract:… and the need for better monitoring, reconfiguring and response in military systems, has placed greater importance on the protection and control of power delivery. The embodiment of the MLC and BTC functions in solid-state switchgear utilizing Silicon … more
Abstract:This project will extend the performance and capabilities of an existing and proven Silicon-on-Insulator (SOI) high temperature gate drive integrated circuit developed by the University of Tennessee (UT) to meet the Army's requirements for a high performance SiC Gate Drive. GPE and UT will develop… more
Abstract:… use slightly enriched uranium oxide fuel pellets with zirconium alloy (zircaloy) clad. Because the clad oxidizes in the reactor coolant, the fuel burnup is limited to a maximum of five years, or a batch average of 55 gigawatt days per ton (gwd/t). An advanced silicon … more
Abstract:This Small Business Innovation Research (SBIR) Phase I Project is focused on research to develop reinforced silicon carbide hollow spheres. This effort will apply a modified version of its proprietary hollow sphere production process in combination with… more
Abstract:Silicon carbide (SiC) and other wide band-gap semiconductors offer great promise of high power rating, high operating temperature, simple thermal management, and ultra-high power density for both space and commercial power electronic systems. However, this… more
Abstract:In this SBIR project, APEI, Inc. is proposing to develop a high efficiency, rad-hard 3.8 kW silicon carbide (SiC) Power Processing Unit (PPU) for Hall Effect thrusters. In Phase I of the project, APEI, Inc. will focus on investigating various circuit topologies, developing and… more
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