Thin-wall ceramic composite heat transfer materials with suitable corrosion resistance in potassium seed-laden coal combustion products are potentially the most effective method to preheat the combustion air delivered to a magnetohydrodynamic (mhd) combustor. three critical issues confront ceramic… More

Space based platforms require substantial on-board power systems with a need for waste heat rejection. Prior work performed on such programs as SUPER has led to the design of carbon/carbon radiators with refractory metal tubular heat transfer fluid circuits embedded in the composite. These radiators… More

Hot gas particulate filtration is critical to nearly every clean coal energy conversion technology. to date, ceramic filters have exhibited limited life and reliability because of thermal shock, thermal stress, and corrosion reactions with coal ashconstituents. oxide fiber-oxide matrix ceramic… More

High speed combined cycle propulsion systems have several subsystems in common including the need for a method through which the exhaust nozzle area can be varied to meet the range of altitudes and velocities within a given systems' flight envelope. The extremely high temperatures and limited… More

A microwave-assisted chemical vapor infiltration (CVI) process is proposed as a low cost method for fabrication of ceramic composite components for expendable turbine engines. In Phase I, optimum processing parameters for a small scale reactor d(4" diameter reaction zone and 2.6 kW microwave power… More

An innovative approach for producing dense adherent, protective oxides for radiatively-cooled C/HfC-TaC ceramic matrix composite (CMC) rocket thrusters capable of handling a broad spectrum of higher performance propellant-oxidant reactants is outlined. HfC- TaC CMCs of varying composition will be… More

A pulsed microwave power, pulsed pressure method that is capable of uniformly and rapidly densifying thick CMC parts to density levels of 95% or greater is proposed. A systematic approach for independently varying the microwave power and reactant pressure cycles in order to define the optimum… More

Ceramin Composites is please to propose an innovative ceramic composite sheath-monolithic ceramic concept that offers the potential for a tough, low permeability rocket thruster. A previous Phase I SBIR program demonstrated that exceptional damage tolerance and strength improvements could be… More

CCI WILL INVESTIGATE NOVEL CHEMICAL VAPOR INFILTRATION (CVI) PROCESSING TECHNIQUES TO DEMONSTRATE A COMPOSITE MATERIAL CERAMIC (CMC) FABRICATION PROCESS FOR SILICON CARBIDE (SIC) MIRRORS AND OPTICAL COMPONENTS. THE PROPOSED METHOD WILL COMBINE THE CVI OF A REINFORCED FIBROUS CVD/SIC WITH THE… More

The materials used in current thruster technology meet the performance parameters and environmental constraints needed for missile and space defense with difficulty at best and even then only with a high penalty in cost and weight. Spacecraft chemical propulsion systems with higher performance… More

Divert propulsion systems are relying on ceramic matrix composite (CMC) thrust chambers to provide the high performance capabilities required by BMDO defensive missiles. Although the high temperature and toughness properties of ceramic matrix composites (CMC) have made them leading candidates for… More

The proposed work addresses the generic need for more flexible methods of fabricating complex-shaped, three demensional solid objects from refractory structural materials. The proposed technology will enable fabrication of complex-shaped refractory metal components which cannot be made using… More

The present focus for light weight body armor requires that materials properties are optimized and that new and innovative techniques are incorporated to achieve the required ballistic performance and make these materials conformable to the body shape. Through the lamination of ceramic tapes,… More

The development of a remarkable Ti3SiC2 material for use in ceramic matrix composite (CMC) fiber coatings and matrix laminates is proposed. This material possesses a myriad of favorable properties for high temperature structural applications - demonstrating machinability, strength, ductility,… More

This proposal outlines plans for utilizing visible light stereolithography-based techniques for the fabrication of near net shape foam metal components with designed and controlled porosity. Design and control of three basic aspects of pore structures in foams allow significant improvement in their… More

50680-98-I High Performance SiC/SiC Composites for Structural Fusion Reactor Components--Ceramic Composites, Inc., 1110 Benfield Blvd., , Millersville, MD 21108-3001; (410) 224-3710 Mr. Matthew Pope, Principal Investigator Mrs. Sharon S. Fehrenbacher, Business Official DOE Grant No.… More

The proposed work addresses limitations in current methods used to fabricate fluidic hot gas valve bodies for divert propulsion. Fluidic valves are preferred over more conventional valves because of their extremely fast response time, on the order of several milliseconds. Fluidic valve bodies… More

The high specific impulse and efficiency of ion propulsion thrusters has increased the popularity of these devices for a growing number of proposed missions, such as planetary and deep space, longer station keeping mission lifetimes, and tighter geosynchronous orbit tolerances. Grid erosion is one… More

Substantial improvements in weight reduction, strength, modulus and wear resistance are essential in meeting the design criteria for the next generation of aircraft, spacecraft, and missiles. CCI proposes the development of a one step, low-costfabrication process for a novel AlB2 in-situ… More

The next generation of rocket propulsion thrusters will be required to be lighter, and provide higher thrusts with no increase in the cost of manufacturing. The fabrication of a very light weight propulsion systems is proposed through the integration of alight weight ceramic injector with a ceramic… More

The proposed research effort focuses on developing a method to synthesize and crystallize doped YAG to produce textured or single crystal fibers that exhibit little degredation in strength and excellent creep resistance at temperatures in excess of 1400C.YAG will be synthesized from polymerized sol… More

DESCRIPTION: The overall goal of this development is a low cost automated fabrication system for indirect, all-ceramic and polymer composite restorations as alternatives to amalgam. Ceramic and polymer composite restorations are available and have shown good results… More

The next generation of rocket propulsion thrusters will be required to be lighter, and provide higher thrusts with no increase in the cost of manufacturing. The fabrication of a very light weight propulsion systems is proposed through the integration of alight weight ceramic injector with a ceramic… More

Ceramic Composites Inc. proposes its novel fiber reinforced Ultra Refactory Composites as an enabling technology for replacement of heavy and expensive rhenium components in BMDO divert and attitude systems (DACS). A systematic approach for optimizing agraded C-Re matrix and a graded C-HfC/SiC… More

72731S03-I A new high-thermal-conductivity carbon foam, with thermal transfer properties superior to those of aluminum and copper, has been developed at Oak Ridge National Laboratory for application to heat exchangers in power plants. Although this foam provides up to 3.5 times the heat rejection… More

Ceramic Composites Inc. has increased the elastic modulus of high thermal conductivity carbon foam heat exchanger material, making it possible to consider the material for improving sub-system thermal management. The material already provides significantpotential for weight and volume reduction, but… More

The objective of the proposed Phase II development effort is to establish a material system and robust fabrication methodology to produce ultra-refractory (UF), ceramic matrix composite (CMC) components based on C(f)/HfC90SiC10 compositions for futurescramjet combustors and nozzle liners. The… More

The objective of the proposed Phase II development effort is to establish a material system and robust fabrication methodology to produce ultra-refractory (UF), ceramic matrix composite (CMC) components based on C(f)/HfC90SiC10 compositions for futurescramjet combustors and nozzle liners. The… More

Ceramic Composites, Inc. will demonstrate the feasibility of constructing a lightweight, affordable and dimensionally stable SiC mirrors using an innovative process. The structure will combine rigorous thermal control as well as structural strength and stiffness. The proposed technology… More

72731-Thermoelectric power plants account for 39% of the fresh water withdrawn from streams and lakes in the United States, second only to agriculture. 3.3 billion gallons daily are lost to evaporation and 190 billion returned as warm water discharge. The link between adequate supplies of low-cost… More

The use of fluid counter-jets to disrupt the axial symmetry of armor piercing shaped charge warhead jets was demonstrated during the last century, but the research was limited in its scope to large cross-sections. The mass and bulk of these cross-sections restricted their suitability for fielding… More

The Phase II development effort focuses on 1) adapting existing rapid prototyping techniques for the robust, fabrication of metallic and ceramic injectors for bipropellant systems and 2) with the integration and joining of these injectors with ceramic matrix composite nozzles. The fabrication of… More

NASA's program for Solar System Exploration will augment the current remote sensing approach to solar system exploration with a robust program that includes in situ measurements at key places. This requires robotic explorers capable of operation and survivability in high-temperature/high-pressure… More

Ceramic Composites Inc. (CCI) of Millersville, MD in association with Swales Aerospace of Beltsville, MD have evaluated an innovative approach for the design of a Venus probe to maximize the payload volume and mass, while increasing probe lifetime. CCI and Swales have evaluated state-of-the-art… More

One of the great hurdles to further development and evaluation of nuclear thermal propulsion systems is the issue surrounding the release of radioactive material from the fuel during ground testing and its subsequent impact on test facility siting and operation. Therefore, the development of a… More

One of the great hurdles to further development and evaluation of nuclear thermal propulsion and power systems is the issue surrounding the release of radioactive material from the fuel during ground testing and its subsequent impact on test facility siting and operation. Therefore, the development… More