Manufacturing & Materials

Materials

This technique uses nanocluster assembly to produce model soft magnetic materials with simpler chemical composition than existing materials and well-controlled nanostructure,...

In previous research, a high-mechanical- advantage actuator system inspired by the fibrillar networks in plant cell walls was developed. One of the basic elements in the...

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
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...

Dielectric thin films play a very important role in the development of microelectromechanical systems (MEMS). These dielectric materials often are used as insulating layers in...

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...

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...

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...

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...

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....

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
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...

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...

Composites of glucose oxidase (GOx), carbon nanotubes (CNTs), and biologically synthesized silica have been synthesized and tested. These composites are prototypes of biological/electrical...

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...

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...

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...

Electrically conductive, solventless nanoparticle liquids, consisting of gold nanoparticles chemically functionalized with large organic molecular groups, have been investigated for...

A research project has yielded progress on several fronts toward the goal of minimizing thermal and aging distortions of composite-material (specifically, polymer-...

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
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...

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...

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...

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...

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....

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...

A n experimental study has shown that the AC short-term dielectric breakdown potential of material specimens consisting of polyhedral oligomeric silsesquioxane (POSS) nanoparticles...

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
Castable, Relatively Stiff Acoustic-Damping Materials

A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials:

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