Materials & Coatings

Adaptive Thermal Management System

This technology employs a unique way to autonomously regulate the temperature of a structure or vessel.NASA seeks to license the Adaptive Thermal Management System (ATMS) for use in commercial applications. Developed at the John F. Kennedy Space Center, the ATMS provides a way to regulate heat transfer and enable thermal management between two opposing surfaces in either direction. The system has the capability to adapt to provide conductive or insulative functionality depending on environmental conditions or applied stimuli. The ATMS can be designed for use in manufacturing, storage vessels, fluid transfer, aerospace and building architectures, and many other applications to reduce unwanted heat transfer, lower energy usage, or maintain environments at a specific temperature. The ATMS is part of NASA’s technology transfer program, which seeks to promote the commercial use of NASA-developed technologies.

Posted in: Briefs, Materials

Read More >>

Method of Bonding Dissimilar Materials

Elastic adhesive overcomes the problems associated with large differences in thermal expansion coefficients. An image of the Materials International Space Station Experiment-5 (MISSE-5) samples prior to launch shows a golden thermal blanket with flexible material samples attached. NASA’s Goddard Space Flight Center has developed a new method for bonding dissimilar materials using an elastic adhesive to permit the bond to withstand variations in temperature and pressure. Specifically, NASA uses this method to provide a >98% specular finish on composite materials that is proven capable of withstanding ultraviolet solar radiation exposure in a vacuum and thermal cycling from –115 °C to +65 °C, as well as meeting outgassing requirement limits of 1%.

Posted in: Briefs, Materials

Read More >>

Nanoencapsulated Aerogels Produced by Monomer Vapor Deposition and Polymerization

This technology provides a method for making strong and lightweight aerogels with insulating properties. The nano-encapsulated aerogel technology has the strength and insulation properties for many applications. The Johnson Space Center researched methods to coat aerogel insulation in order to make it better able to withstand vibration, mechanical compression and flexure, and other environmental damage. This NASA-developed nanoencapsulated aerogel technology is a method for increasing the strength of the aerogel through a coating process while maintaining its insulating properties. With this ruggedizing process, the coating of the aerogel reduces mechanical damage, enabling its practical use in products that might not be suitable with the more fragile aerogel. The basic coating can also shield it from adsorbing humidity or other gases, which could otherwise bind to the substance and change its properties. Functionalized coatings could be developed to adsorb certain gases if that is desired. Aerogel’s low density and extremely low thermal conductivity make it useful as a lightweight, volume-efficient insulation material. Encapsulating the aerogel expands its ability to be incorporated into products that are exposed to vibration and compression during manufacture, shipping, or use. It can also improve its flexibility, opening up a range of new product uses.

Posted in: Briefs, Materials

Read More >>

Insulative Carbon Fiber Systems for Aerospace Applications

New insulative carbon-fiber composite systems have been developed for use in structural and thermal applications for the aerospace vehicle interface. The sandwich-type composite structure, including carbon fiber and aerogel blanket materials, is based on the previously disclosed family of hybrid laminate composites. Offering unique and tailorable combinations of structural and thermal properties, these insulative carbon fiber systems can be used in vehicle shroud and thermal protection system applications at the aerodynamic interface plane, panels between stages, or fairings for spacecraft equipment space of space launch vehicles. The novel, lightweight, fiber composite laminate system with reduced heat transfer also has increased impact resistance at low temperatures.

Posted in: Briefs, Materials

Read More >>

In-Situ Formation of Reinforcement Phases in Ultra-High- Temperature Ceramic Composites

This technology could be used in re-entry vehicles, reusable launch vehicles, hypersonic vehicle leading edges, and commercial spacecraft.Future-generation materials for use on space transportation vehicles require substantial improvements in material properties leading to increased reliability and safety, as well as intelligent design to allow for current materials to meet future needs. Ultra-high-temperature ceramics (UHTC), composed primarily of metal diborides, are candidate materials for sharp leading edges on hypersonic re-entry vehicles. NASA has demonstrated that it is possible to form high-aspect-ratio reinforcement phases in-situ during the processing step for both ceramic composites and UHTCs. Initial characterization of these systems has demonstrated that crack deflection along the matrix-reinforcement interface is observed yielding a system of improved toughness over the baseline system, leading to improved mechanical performance. The reinforced composites should therefore reduce the risk of catastrophic failure over current UHTC systems.

Posted in: Briefs, Coatings & Adhesives, Materials

Read More >>

Multi-Phase Ceramic System

Bearing surfaces are typically either metal-on-metal (MOM), ceramic-on-ceramic (COC), or metal-on-polyethylene (MOP). MOM and MOP couplings have the drawback that metallic or polyethylene particles can sometimes separate from the couplings, which can cause significant problems, particularly in a hip or joint replacement. COC couplings are less likely to lose particles due to wear, which makes them more biocompatible, but they are more susceptible to fracture. COC couplings also have a tendency to squeak as they move. Innovators at NASA’s Glenn Research Center have developed a technique using rare earth elements to fabricate a dual-phase ceramic composite that combines a wear-resistant phase and a solid-state lubricant phase. The result is a coupling material that, compared to currently used materials, exhibits a tenfold reduction in the friction coefficient, a sixfold reduction in wear, and a significant reduction in debris caused by wear. Glenn’s groundbreaking rare-earth aluminate composite has considerable potential, not only in biomedical applications, but also in commercial and industrial sectors.

Posted in: Briefs, Ceramics, Materials

Read More >>

Minimally Machined HoneySiC Panels and T300 HoneySiC

The materials are intended for low areal density and near-zero CTE optomechanical structures.The primary purpose of this work is to develop and demonstrate technologies to manufacture ultra-low-cost precision optical systems for very large x-ray, UV/optical, or infrared telescopes.

Posted in: Briefs, Coatings & Adhesives, Materials

Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.