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NASA NTRS · 20160014912

Select Additive Manufacturing Projects at NASA Glenn Research Center

Sudbrack, Chantal·Ellis, David·Hijonos, Alejandro·Stanford, Malcolm·Carter, Bob·Lerch, Brad·Smith, Tim
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Abstract

This presentation to a university audience focuses on presenting the additive manufacturing projects on nickel alloys currently underway at Glenn Research Center.

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nickelmetal powderadditive manufacturing

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Sudbrack, Chantal, Ellis, David, Hijonos, Alejandro, Stanford, Malcolm, Carter, Bob, Lerch, Brad, Smith, Tim. 2016-04-22. Select Additive Manufacturing Projects at NASA Glenn Research Center. https://ntrs.nasa.gov/citations/20160014912

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Voltage-Controlled Differential Faraday Rotation from FMNWs and Magnetoelastic Silicone-Nickel Composites

Differential Faraday rotation has been observed from strain-Differential Faraday rotation has been observed from strain-modulated magnetoelastic membranes using millimeter-wave polarimetry at 61.25 GHz. The membranes, consisting of aligned chains of nickel micro-particles embedded in silicone rubber, were manufactured using a roll-to-roll electromagnetic processing line, mounted onto piezoelectric ceramic annuli, and immersed in externally-generated static magnetic fields. Experiments were conducted in which the membranes were periodically stretched by operating the piezoelectric crystals close to their radial resonant frequencies—thereby modulating nickel particle density as well as magnetic material properties. A customized quasi-optical apparatus was used to determine the Faraday-rotation difference between the strained and unstrained states of the magnetoelastic membranes. Possible applications that could emerge from this polymer-based technology include nonreciprocal millimeter-wave components with voltage-controlled frequency response and bio-inspired geomagnetic sensors for GPS-denied navigation. Investigations were conducted to estimate the maximum attainable differential Faraday rotation and the minimum detectable static magnetic field.

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