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Briefs Materials
Lubrication Considerations for Military Equipment
Military equipment is subject to increasingly harsh environmental conditions and performance requirements. Simultaneously, engineers and equipment operators are demanding longer service life and less maintenance. The proper approach to lubrication is critical to minimizing equipment failures and...
Briefs Materials
Barium Ferrite Materials for Microwave Circulators
Barium ferrite thick disks have been fabricated for incorporation in self-biased microwave devices. The process uses barium ferrite nanopowder mixed with epoxy. The mix is placed on alumina substrates to fabricate 500 μm thick disks of BaM to achieve good magnetic properties such as magnetic...
Briefs Materials
Films Containing Nanostructures and/or Reactive Scavengers
Several advances have been made in research in the art of tailoring polymeric films to be, variously, (1) much more effective as barriers to diffusion of liquids and gases than they...
Briefs Materials
Composites Containing Nanostructured Shape-Memory Alloys
A continuing program of research is devoted to understanding composite materials that include nanostructured shape-memory alloy (SMA) constituents and to developing methods of fabricating components from such materials. This research is intended to improve the utilization of SMAs in...
Briefs Materials
Silicon Nanowires for Anodes of Rechargeable Li Power Cells
Silicon nanowires have been investigated as alternatives to the graphite heretofore widely used as an anode material in rechargeable lithium-ion power cells. The theoretical specific...
Briefs Materials
Flexible Biohybrid Nanomembranes for Multifunctional Sensors
A document describes recent activities in a continuing effort to develop devices, based on biohybrid nanomembranes, that would perform diverse sensory functions. The term "biohybrid nanomembranes" signifies flexible organic/inorganic composite membranes, of the order of tens of nanometers...
Briefs Materials
Oxide and Nitride Films for Tunable Capacitors and HEMTs
A report describes research on thin oxide films intended for use as variable-high-permittivity dielectrics in advanced tunable capacitors and on thin nitride films as starting materials for advanced high-electron- mobility transistors (HEMTs). In this research, a custom molecular-beam-epitaxy...
Briefs Materials
Aligned MWCNTs as Thermal Conductors in Adhesive Joints
A developmental method of increasing the thermal conductance of an adhesive joint in a composite-material structure (or between a composite-material structure and another structure)...
Briefs Materials
Electrochromic Devices for Controlling Infrared Emissivity
Electrochromic devices that exhibited adjustable infrared emissivity were developed in a research program that was part of a larger effort to develop adaptive infrared camouflage....
Briefs Materials
Testing Silver-Coated Nylon Fibers as Electrical Conductors
Tests have been performed in an effort to gain understanding of electrical and mechanical properties of silver-coated nylon fibers subjected to stresses and strains and exposed to...
Briefs Photonics/Optics
Kinetic Modeling of Laser-Induced D-T Fusion
A computational- simulation study was performed to assess the feasibility of laser-induced fusion of deuterium nuclei with tritium nuclei as a means of generating neutrons for use in neutron...
Briefs Materials
Progress in Design and Synthesis of Nanostructured Materials
A five-and-a-half-year integrated multidisciplinary research project has been characterized by three themes pertinent to the development of advanced materials having tailorable...
Briefs Materials
GOx/CNT/Silica Composites for Bioelectrodes
Composites of glucose oxidase (GOx), carbon nanotubes (CNTs), and biologically synthesized silica have been synthesized and tested. These composites are prototypes of biological/electrical interfacial...
Briefs Materials
Dimensional Stabilization of Composite Space Structures
A research project has yielded progress on several fronts toward the goal of minimizing thermal and aging distortions of composite-material (specifically, polymer- matrix/graphite-fiber)...
Briefs Materials
Gold-Based Nanoparticle Liquids for Electronic Applications
Electrically conductive, solventless nanoparticle liquids, consisting of gold nanoparticles chemically functionalized with large organic molecular groups, have been investigated for...
Briefs Materials
Incorporating Functional Fillers into Silicone Elastomer Systems
Silicones can be developed into fluids, gels, adhesives, elastomers, and resins designed with unique properties that make them ideal for specific application uses in the defense...
Briefs Materials
Some Advances in High-Temperature Superconductor Coatings
Several advances were made in a program focused on the science and technology of high-temperature superconductors [especially yttrium barium copper oxide ("YBCO")] deposited on normal electrical conductors. This program was part of a continuing effort to develop superconductor-coated normal...
Briefs Materials
Less-Polluting Resins for Molding Composite Structures
Liquid resins that are suitable for use in molding composite- material structural panels and that contain and emit smaller amounts of air-polluting volatile organic compounds than do...
Briefs Materials
Making Ultra-Hydrophobic Textured Silicone-Rubber Surfaces
Silicone-rubber surfaces microscopically textured in such a manner as to render them ultra-hydrophobic have been fabricated by a method in which breath figures are utilized. Originally,...
Briefs Materials
High-Temperature Resins for Composite Materials
Improved, readily processable thermosetting polymer resins are being developed for use as matrix materials in composite-material structures in applications in which there are requirements for...
Briefs Materials
High-Strain-Rate Tests of Epoxy/Aluminum-Powder Composites
Initial tests have been performed in a continuing experimental study to determine selected mechanical properties, at high strain rates, of an epoxy and of composite materials consisting...
Briefs Materials
Continuous Carbon Nanofibers for Structural Composites
A program of research has addressed key issues in the production of continuous carbon nanofibers and the utilization of carbon nanofibers as the reinforcing components in matrix/fiber...
Briefs Physical Sciences
Castable, Relatively Stiff Acoustic-Damping Materials
A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials:
Briefs Nanotechnology
Low-Water-Permeability Encapsulants for Acoustic Sensors
Afamily of improved encapsulating materials for protecting underwater acoustic sensors has been invented. These materials could also be used for encapsulation or protective coating of...
Briefs Materials
Improved Dielectric-Breakdown Property of POSS-Filled Epoxy
A n experimental study has shown that the AC short-term dielectric breakdown potential of material specimens consisting of polyhedral oligomeric silsesquioxane (POSS) nanoparticles...
Briefs Materials
Alloys for Nozzles of Hypersonic Wind Tunnels
Alloys are being developed for nozzles of hypersonic wind tunnels to be used in testing components of future hypersonic missiles, aircraft, and space transportation systems. The nozzle components...
Briefs Materials
Self-Lubrication of Hot YSZ-Ag-Mo Nanocomposite Coatings
An experimental study has been performed to learn about the physical and chemical mechanisms of self-lubrication of coatings that comprise nanostructured composites of yttria-stabilized...
Briefs Semiconductors & ICs
Photonic Analog-to-Digital Converters
Early steps have been taken toward the development of analog-to-digital converters (ADCs) that would incorporate photonic quantizers based on the technology of InP semiconductors. These photonic ADCs are...
Briefs Materials
Solid-State Viscosity Sensors For Military and Aerospace Applications
Embedded OEM application markets such as the military and aerospace industries are experiencing a growing demand for sensors that provide instantaneous and continuous process...
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