Briefs: Materials
Highly Stable and Active Catalyst for Sabatier Reactions
Highly active Ru/TiO2 catalysts for Sabatier reaction have been developed. The catalysts have shown to be stable under repeated shutting down/startup conditions. When the Ru/TiO2 catalyst is coated on the engineered substrate FeCrAlY felt, activity enhancement is more...
Briefs: Materials
Polyoxyphenylene triazole sulfonic acid has been proposed as a basis for development of improved proton-conducting polymeric materials for solidelectrolyte membranes in hydrogen/air...
Briefs: Materials
Molecular Adsorber Coating
A document discusses a zeolite-based sprayable molecular adsorber coating that has been developed to alleviate the size and weight issues of current ceramic puck-based technology, while providing a configuration that more projects can use to protect against degradation from outgassed materials within a spacecraft,...
Briefs: Materials
Detection of Carbon Monoxide Using Polymer-Carbon Composite Films
A carbon monoxide (CO) sensor was developed that can be incorporated into an existing sensing array architecture. The CO sensor is a low-power chemiresistor that operates at room temperature, and the sensor fabrication techniques are compatible with ceramic substrates.
Briefs: Materials
Sustainably Sourced, Thermally Resistant, Radiation Hard Biopolymer
This material represents a breakthrough in the production, manufacturing, and application of thermal protection system (TPS) materials and radiation shielding, as this represents the first effort to develop a non-metallic, nonceramic, biomaterial-based, sustainable TPS with the...
Briefs: Materials
Temperature-Sensitive Coating Sensor Based on Hematite
A temperature-sensitive coating, based on hematite (iron III oxide), has been developed to measure surface temperature using spectral techniques. The hematite powder is added to a binder that allows the mixture to be painted on the surface of a test specimen. The coating dynamically changes...
Briefs: Materials
Substituted Quaternary Ammonium Salts Improve Low-Temperature Performance of Double-Layer Capacitors
Double-layer capacitors are unique energy storage devices, capable of supporting large current pulses as well as a very high number of charging and discharging cycles. The performance of double-layer capacitors is highly dependent on the nature...
Briefs: Materials
Standardization of a Volumetric Displacement Measurement for Two-Body Abrasion Scratch Test Data Analysis
A limitation has been identified in the existing test standards used for making controlled, two-body abrasion scratch measurements based solely on the width of the resultant score on the surface of the material. A new, more robust method is...
Briefs: Materials
Use of Additives to Improve Performance of Methyl Butyrate-Based Lithium-Ion Electrolytes
This work addresses the need for robust rechargeable batteries that can operate well over a wide temperature range. To this end, a number of electrolyte formulations have been developed that incorporate the use of electrolyte additives to improve the...
Briefs: Materials
Li-Ion Cells Employing Electrolytes With Methyl Propionate and Ethyl Butyrate Co-Solvents
Future NASA missions aimed at exploring Mars and the outer planets require rechargeable batteries that can operate at low temperatures to satisfy the requirements of such applications as landers, rovers, and penetrators. A number of terrestrial...
Briefs: Materials
Fiber-Reinforced Reactive Nano-Epoxy Composites
A family of metal/ceramic composite materials has been developed that are relatively inexpensive, lightweight alternatives to structural materials that are typified by beryllium, aluminum, and graphite/epoxy composites. These metal/ceramic composites were originally intended to replace beryllium...
Briefs: Materials
Iridium-Doped Ruthenium Oxide Catalyst for Oxygen Evolution
NASA requires a durable and efficient catalyst for the electrolysis of water in a polymer-electrolyte-membrane (PEM) cell. Ruthenium oxide in a slightly reduced form is known to be a very efficient catalyst for the anodic oxidation of water to oxygen, but it degrades rapidly, reducing...
Briefs: Energy
Polymerization Initiated at the Sidewalls of Carbon Nanotubes
A process has been developed for growing polymer chains via anionic, cationic, or radical polymerization from the side walls of functionalized carbon nanotubes, which will facilitate greater dispersion in polymer matrices, and will greatly enhance reinforcement ability in polymeric...
Briefs: Materials
Piezoelectrically Enhanced Photocathodes
Doping of photocathodes with materials that have large piezoelectric coefficients has been proposed as an alternative means of increasing the desired photoemission of electrons. Treating cathode materials to increase emission of electrons is called “activation” in the art. It has been common practice...
Briefs: Materials
Metal-Matrix/Hollow-Ceramic-Sphere Composites
A family of metal/ceramic composite materials has been developed that are relatively inexpensive, lightweight alternatives to structural materials that are typified by beryllium, aluminum, and graphite/epoxy composites. These metal/ceramic composites were originally intended to replace beryllium...
Briefs: Materials
Dispersion-strengthened molybdenum-rhenium alloys for vacuum plasma spraying (VPS) fabrication of high-temperature-resistant components are undergoing development. In comparison with...
Briefs: Materials
Self-Cleaning Coatings and Materials for Decontaminating Field-Deployable Land and Water-Based Optical Systems
This technology exploits the organic decomposition capability and hydrophilic properties of the photocatalytic material titanium dioxide (TiO2), a non-toxic and non-hazardous substance, to address contamination and biofouling...
Briefs: Materials
Li Anode Technology for Improved Performance
A novel, low-cost approach to stabilization of Li metal anodes for high-performance rechargeable batteries was developed. Electrolyte additives are selected and used in Li cell electrolyte systems, promoting formation of a protective coating on Li metal anodes for improved cycle and safety...
Briefs: Materials
Low-Outgassing Photogrammetry Targets for Use in Outer Space
A short document discusses an investigation of materials for photogrammetry targets for highly sensitive optical scientific instruments to be operated in outer space and in an outer-space-environment-simulating thermal vacuum chamber on Earth. A key consideration in the selection of...
Briefs: Materials
Separation of Single-Walled Carbon Nanotubes with DEP-FFF
A process using a modified dielectrophoresis device separates single-walled carbon nanotubes (SWNTs) according to their polarizability in electric fields. This depends on the size and dielectric constant of individual nanotubes and easily separates metallic from semiconducting nanotubes....
Briefs: Materials
Optical Coating Performance for Heat Reflectors of the JWST-ISIM Electronic Component
A document discusses a thermal radiator design consisting of lightweight composite materials and low-emittance metal coatings for use on the James Webb Space Telescope (JWST) structure. The structure will have a Thermal Subsystem unit to provide passive cooling...
Briefs: Materials
Measuring Moisture Levels in Graphite Epoxy Composite Sandwich Structures
Graphite epoxy composite (GEC) materials are used in the construction of rocket fairings, nose cones, interstage adapters, and heat shields due to their high strength and light weight. However, they absorb moisture depending on the environmental conditions they are exposed...
Briefs: Materials
Real-Time Deposition Monitor for Ultrathin Conductive Films
A device has been developed that can be used for the real-time monitoring of ultrathin (2 Å or more) conductive films. The device responds in less than two microseconds, and can be used to monitor film depositions up to about 60 Å thick. Actual thickness monitoring capability will...
Briefs: Materials
Marshall Convergent Spray Formulation Improvement for High Temperatures
The Marshall Convergent Coating-1 (MCC-1) formulation was produced in the 1990s, and uses a standard bisphenol A epoxy resin system with a triamine accelerator. With the increasing heat rates forecast for the next generation of
vehicles, higher-temperature sprayable...
Briefs: Materials
Optimized Li-Ion Electrolytes Containing Triphenyl Phosphate as a Flame-Retardant Additive
A number of future NASA missions involving the exploration of the Moon and Mars will be “human-rated” and thus require high-specific-energy rechargeable batteries that possess enhanced safety characteristics. Given that Li-ion technology is the most...
Briefs: Medical
Although the concept of nanotechnology (controlling matter on an atomic scale) dates back to 1959, it is only now becoming more commercially realized. It has the potential to challenge...
Briefs: Materials
Novel Low-Density Ablators Containing Hyperbranched Poly(azomethine)s
An ablative composite is low-density (0.25 to 0.40 g/cm3), easy to fabricate, and superior to the current state-of-the-art ablator (phenolic impregnated carbon ablator, PICA) in terms of decomposition temperature, char yield, and mechanical strength. Initial...
Briefs: Materials
Commercialization of LARC™-SI Polyimide Technology
LARC™-SI, Langley Research Center-Soluble Imide, was developed in 1992, with the first patent issuing in 1997, and then subsequent patents issued in 1998 and 2000. Currently, this polymer has been successfully licensed by NASA, and has generated revenues, at the time of this reporting,...
Briefs: Materials
Carbon Nanotubes on Titanium Substrates for Stray Light Suppression
A method has been developed for growing carbon nanotubes on a titanium substrate, which makes the nanotubes ten times blacker than the current state-of-the-art paints in the visible to near infrared. This will allow for significant improvement of stray light performance in...
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