Additive Manufacturing

JUL 2018

ADDITIVE MANUFACTURING is the magazine devoted to industrial applications of 3D printing and digital layering technology. We cover the promise and the challenges of this technology for making functional tooling and end-use production parts.

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JULY 2018 Additive Manufacturing CHECK THIS OUT 56 By Stephanie Hendrixson Orion Gets a Lift from Electro-Static Dissipative (ESD) Material "Going back throughout the history of 3D printing it's been 'Let's find materials that print well,' and then 'How can we use them?'" says Scott Sevcik, vice president of man- ufacturing solutions for Stratasys. But in bringing 3D printing into production applica- tions, he says the company has learned that "we can't start with 'What material works for us?' We have to start with 'What are the properties our customer needs?'" That approach was carried to the extreme in the recent development of Antero 800NA, a filament for Stratasys fused deposition modeling (FDM) printers that will be used in parts for NASA's Orion deep-space spacecraft. Static electricity can build up more readily in space than in the earth's atmosphere, so NASA requested electro-static dissipative (ESD) material properties that would allow the 3D-printed parts to conduct and therefore dissipate electrical charges. Stratasys worked with NASA, Lockheed Martin and Phoenix Analysis & Design Technologies (PADT) to develop and test Antero 800NA. To achieve NASA's strength and outgassing requirements, the company selected PEKK as the filament's base resin, a semicrystalline polymer more conventionally used in powder-bed printing processes. Carbon nanotubes integrated into the filament control the polymer's conductivity to dissipate electricity. Read more about this material at NASA's Orion spacecraft is in- tended to support increasingly complex missions into deep space, both with and without astronauts on board. The craft will include more than 100 3D-printed parts, many made from the new Antero 800NA filament with ESD properties. Image: NASA Among the parts that Lockheed Martin is 3D printing from Antero 800NA is a series of six parts like this that will be used on Ori- on's docking hatch (see below). The PEKK- based thermoplastic incorporates carbon nanotubes for electro-static dissipative (ESD) properties. The six pieces lock together to form this ring on Orion's docking hatch. The ESD properties of the Antero filament enable them to dissipate charges, reducing the risk of creating sparks that could damage electrical equipment in space.

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