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Freeze Tape Casting of Functionally Graded Porous Ceramics

Pore structures can be tailored in ways heretofore impossible. Freeze tape casting is a means of making preforms of ceramic sheets that, upon subsequent completion of fabrication processing, can have anisotropic and/or functionally graded properties that notably include aligned and graded porosity. Freeze tape casting was developed to enable optimization of the microstructures of porous ceramic components for use as solid oxide electrodes in fuel cells: Through alignment and grading of pores, one can tailor surface areas and diffusion channels for flows of gas and liquid species involved in fuel-cell reactions. Freeze tape casting offers similar benefits for fabrication of optimally porous ceramics for use as catalysts, gas sensors, and filters.

Posted in: Manufacturing & Prototyping, Briefs, TSP

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Modeling Metamaterials Leads to Advance in Cloaking System Prototype

In efforts to use metamaterials to construct the world’s first working prototype of an invisibility cloak, researchers relied on multiphysics software. Modeling software is generally used to show the fields and flows that are impossible to see with the eye or instruments. A group of researchers has done just the opposite: They ran computer simulations that showed it should be possible to fabricate the metamaterials necessary to build an “invisibility cloak” that makes an object invisible to certain frequencies.

Posted in: Materials, Briefs

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From Killer Gas to Cure



Posted in: Blog

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NASA News

Researchers from NASA and Lockheed Martin have tested software for a robotic extension device that dramatically improves astronauts' ability to perform remote tasks under adverse conditions on the International Space Station (ISS). The method was developed for use with the Special Purpose Dexterous Manipulator, which works in conjunction with the current Space Station Remote Manipulator System (SSRMS).

Posted in: Blog

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Technology Business Briefs

Small Geometry Flash EEPROM & DRAM Memory Patents These patents cover such topics as Flash EEPROM and DRAM device, high storage capacity, cell size, cell layout, product material, etching masking material, photolithography technique, narrower spacing between adjacent line patterns, high packing density of pattern line pitch, and smaller chip sizes.

Posted in: Blog

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Light-Bending



Posted in: Blog

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Free-to-Roll Testing of Airplane Models in Wind Tunnels

Causes of, and cures for, wing-drop/rock behavior can be evaluated. A free-to-roll (FTR) test technique and test rig make it possible to evaluate both the transonic performance and the wing-drop/rock behavior of a high-strength airplane model in a single wind-tunnel entry. The free-to-roll test technique is a single degree-of-motion method in which the model is free to roll about the longitudinal axis. The rolling motion is observed, recorded, and analyzed to gain insight into wing-drop/rock behavior.

Posted in: Mechanical Components, Briefs, TSP

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