Keyword: Coatings, colorants, and finishes

Briefs: Materials

Photocatalytic/ magnetic composite particles have been invented as improved means of exploiting established methods of photocatalysis for removal of chemical and biological pollutants from air and...

Briefs: Manufacturing & Prototyping
Diamond Smoothing Tools

Diamond smoothing tools have been proposed for use in conjunction with diamond cutting tools that are used in many finish-machining operations. Diamond machining (including finishing) is often used, for example, in fabrication of precise metal mirrors.

Briefs: Materials

Thermally sprayed dielectric ceramic coatings are the primary means of attaching strain and temperature gauges to hot-section rotating parts of turbine engines. As hot-section temperatures...

Briefs: Materials
Protective Skins for Aerogel Monoliths

A method of imparting relatively hard protective outer skins to aerogel monoliths has been developed. Even more than aerogel beads, aerogel monoliths are attractive as thermal-insulation materials, but the commercial utilization of aerogel monoliths in thermal-insulation panels has been inhibited by their...

Articles: Electronics & Computers

The continuous increase in the consumption of semiconductor devices and the emergence of new applications in optical components — MEMS, LCD display, flip-chip,...

Briefs: Physical Sciences

A method of compensation for the polarization-dependent phase anisotropy of a metal reflector has been proposed. The essence of the method is to coat the reflector with multiple thin...

Briefs: Electronics & Computers
Coating MCPs With AlN and GaN

A development effort underway at the time of reporting the information for this article is devoted to increasing the sensitivity of microchannel plates (MCPs) as detectors of photons and ions by coating the MCPs with nitrides of elements in period III of the periodic table. Conventional MCPs are relatively...

Briefs: Electronics & Computers

Robust lithium/solid electrolyte/iodine electrochemical cells that offer significant advantages over commercial lithium/ iodine cells have been developed. At room temperature, these...

Briefs: Materials

Some wholly aromatic ether-imides consisting of rod-shaped, relatively-low-mass molecules that can form liquid crystals have been investigated for potential utility as electron-donor-type...

Briefs: Materials
Electrically Conductive Anodized Aluminum Surfaces

Anodized aluminum components can be treated to make them sufficiently electrically conductive to suppress discharges of static electricity. The treatment was conceived as a means of preventing static electric discharges on exterior satin-anodized aluminum (SAA) surfaces of spacecraft without...

Articles: Photonics/Optics

Lightweight, aspheric, reflective optical designs commonly are designed and built for demanding space-based remote sensing, targeting systems, and aerial reconnaissance....

Articles: Photonics/Optics

High-resolution digital imaging, low-light-level biomedical devices, and automotive sensing are just a few of today’s hot technologies demanding both low-cost and high-performance...

Briefs: Materials

Doped pyrochlore oxides of a type described below are under consideration as alternative materials for high temperature thermal barrier coatings (TBCs). In comparison with...

Briefs: Materials

Today, a major thrust toward improving the thermomechanical properties of engine components lies in the development of fiber-reinforced silicon carbide matrix composite materials,...

Briefs: Materials

Experiments have shown the stability enhancement of polymeric sensing films on mixing the polymer with colloidal filler particles (submicron-sized) of carbon black, silver,...

Briefs: Materials

Several recently formulated nickelbase superalloys have been developed with excellent high-temperature creep resistance, at lower densities than those of currently used nickel-base...

Briefs: Materials

A family of tantalum-based ceramics has been invented as ingredients of high-temperature composite insulating tiles. These materials are suitable for coating and/or permeating the outer...

Briefs: Manufacturing & Prototyping
Repairing Chipped Silicide Coatings on Refractory Metal Substrates

The space shuttle orbiter's reaction control system (RCS) is a series of small thrusters that use hypergolic fuels to orient the orbiter in space. The RCS thrusters are constructed from a special niobium-based alloy — the C-103. This alloy retains excellent mechanical...

Briefs: Physical Sciences
Improved Traps for Removing Gases From Coolant Liquids

Two documents discuss improvements in traps for removing noncondensable gases (e.g., air) from heat-transfer liquids (e.g., water) in spacecraft cooling systems. Noncondensable gases must be removed because they can interfere with operation. A typical trap includes a cylindrical hydrophobic...

Articles: Photonics/Optics

Lasers are now used to micromachine virtually every type of material, including metals, plastics, glass, and ceramics. Micromachining is a highly diverse market that uses flash-pumped,...

Briefs: Manufacturing & Prototyping

Arrays of nanowires having controlled dimensions can now be fabricated on substrates, optionally as integral parts of multilayer structures, by means of a cost-effective, high-yield process...

Briefs: Physical Sciences
Polarization Phase-Compensating Coats for Metallic Mirrors

A method of compensating for or minimizing phase differences between orthogonal polarizations of light reflected from metallic mirrors at oblique incidence, as, for example, from weakly curved mirrors, is undergoing development. The method is intended to satisfy a need to maintain...

Briefs: Materials

Polymers having low color and a favorable combination of other properties, including high glass-transition temperature (Tg) and high mechanical properties (strength, tensile modulus,...

Briefs: Manufacturing & Prototyping
Manufacturing Precise, Lightweight Paraboloidal Mirrors

A process for fabricating a precise, diffraction- limited, ultralightweight, composite-material (matrix/fiber) paraboloidal telescope mirror has been devised. Unlike the traditional process of fabrication of heavier glass-based mirrors, this process involves a minimum of manual steps and...

Briefs: Materials

Water-based pressure-sensitive paints (PSPs) have been invented as alternatives conventional organic- solvent-based pressure-sensitive paints, which are used primarily for indicating distributions of air...

Briefs: Materials
Improved Small-Particle Powders for Plasma Spraying

Improved small-particle powders and powder-processing conditions have been developed for use in plasma spray deposition of thermal-barrier and environmentalbarrier coatings. Heretofore, plasmasprayed coatings have typically ranged in thickness from 125 to 1,800 µm. As explained below, the...

Briefs: Semiconductors & ICs

A low-temperature process for fabricating flexible, ohmic contacts for use in organic thin-film transistors (OTFTs) has been developed. Typical drainsource contact materials used...

Briefs: Materials

Comparative tests have been performed to evaluate the corrosion-prevention capabilities of an experimental paint of the type described in "Water-Borne,...

Briefs: Physical Sciences

Chemical sensors based on optical ring resonators are undergoing development. A ring resonator according to this concept is a closed-circuit dielectric optical waveguide. The outermost layer of this...