Keyword: Chromium

Articles: Mechanical & Fluid Systems
Taking a holistic approach to sealing systems in hydraulic systems using chrome alternatives helps engineers achieve optimum function.
Briefs: Test & Measurement
Chromium Removal from PVC Filters
The process does not cause any structural changes to the PVC filter membrane.
Briefs: Electronics & Computers

Most metals, with the notable exception of gold, tend to oxidize when exposed to air and water. This reaction — which produces rust on iron, tarnish on silver, and verdigris on copper or...

Briefs: Materials
Using Sunlight to Activate the Flow of Electrical Current in a New Material

Mined to make the first compass needles, the mineral magnetite is also made by migratory birds and other animals to allow them to sense north and south, and thus navigate in cloudy or dark atmospheric conditions or under water. Researchers have compositionally modified...

Application Briefs: Materials
LumiShield
Pittsburgh, PA
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Corrosion-related issues cost the U.S. economy $276 billion a year. The Energy Department’s National Energy Technology...

Briefs: Materials

At high temperatures, currently available cast stainless steel alloys used for engine component applications do not have the long-term stability of their original castings, and are lacking in their...

Briefs: Electronics & Computers

Purely electrical memory chips commonly used today are volatile and their state must be continuously refreshed, which requires a lot of energy. An alternative to these electrical...

Briefs: Mechanical & Fluid Systems
Microfluidic Pumps Containing Teflon® AF Diaphragms

Microfluidic pumps and valves based on pneumatically actuated diaphragms made of Teflon® AF polymers are being developed for incorporation into laboratory-on-a-chip devices that must perform well over temperature ranges wider than those of prior diaphragm-based microfluidic pumps and valves....

Briefs: Manufacturing & Prototyping
Fabricating Nanodots Using Lift-Off of a Nanopore Template

A process for fabricating a planar array of dots having characteristic dimensions of the order of several nanometers to several hundred nanometers involves the formation and use of a thin alumina nanopore template on a semiconductor substrate. The dot material is deposited in the...

Briefs: Materials

A nickel-based superalloy that resists embrittlement by hydrogen more strongly than does nickel alloy 718 has been developed. Nickel alloy 718 is the most widely used superalloy. It...

Briefs: Medical
Hand-Held Units for Short-Range Wireless Biotelemetry

Special-purpose hand-held radio- transceiver units have been proposed as means of short-range radio powering and interrogation of surgically implanted microelectromechanical sensors and actuators. These units are based partly on the same principles as those of the units described in...

Briefs: Electronics & Computers

A prototype small, lightweight micro Sun sensor (MSS) has been flight qualified as part of the attitude- determination system of a spacecraft or for Mars surface operations. The MSS has previously been...

Briefs: Materials
Formulating Precursors for Coating Metals and Ceramics

A protocol has been devised for formulating low-vapor-pressure precursors for protective and conversion coatings on metallic and ceramic substrates.

Briefs: Test & Measurement

A miniature optoelectronic instrument has been invented as a nonintrusive means of measuring a velocity gradient proportional to a shear stress in a flow near a wall. The...

Briefs: Physical Sciences
Electrokinetic In Situ Treatment of Metal-Contaminated Soil

An electrokinetic technique has been developed as a means of in situ remediation of soils, sludges, and sediments that are contaminated with heavy metals. Examples of common metal contaminants that can be removed by this technique include cadmium, chromium, zinc, lead, mercury, and...

Briefs: Manufacturing & Prototyping

A technique of thermocompressive gold-to-gold diffusion bonding at relatively low temperature has been devised to provide stable, uniform, strong bonds between struc- tural...

Briefs: Electronics & Computers

A proposed active tactile display device would present textual and graphical information to a blind person. The concept of this device is a byproduct of recent research on the use...

Briefs: Manufacturing & Prototyping
Writing Circuit Patterns by Use of Scanning UV Lasers

Scanning ultraviolet (UV) lasers would be used to expose ultraviolet-sensitive photoresists to form patterns of conductors for electronic circuits, according to a proposal. Heretofore, such patterns have been formed by exposing photoresists to collimated ultraviolet or visible light through...

Briefs: Materials

Investigators at the Johnson Space Center White Sands Test Facility (WSTF) have developed specifications of the amounts of alloying elements needed to increase the specific strengths of nickel alloys...

Briefs: Materials

Flexible thermal-insulation blankets made of ceramic fibers can be protected against weather and handling by attaching thin metal face sheets. In applications in which the blankets are exposed to...

Briefs: Materials

PS300 is a self-lubricating solid coating material for use in sliding contacts at temperatures up to 800°C. PS300 is a composite of metal-bonded chromium oxide with barium...

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