EBF3: Electron Beam Freeform Fabrication

EBF3: Electron Beam Freeform Fabrication
Electron Beam Freeform Fabrication is yet another approach for 3D printing, this time developed by the rocket scientists at NASA. They have good reasons for developing EBF3: to save weight on cargo flights to the International Space Station. You can imagine the hefty pile of spare parts that must be carried up yonder and stored somewhere inside a cardboard box in the attic of the ISS. Why carry and store parts when you could print them whenever you need them?

EBF3 is straightforward to understand. A metal feedstock (aluminum is apparently ideal) is heated and fed to a print head that traverses a rotating build platform. We’re wondering about the rotating bit: good for making round objects, not so good for those with straight edges. Perhaps most space station parts are usually round? In any case, EBF3 also can handle two different feedstocks simultaneously, permitting custom alloy printing or having two different materials within the object. One interesting aspect is that EBF3’s build chamber is a vacuum. Easy to find at ISS, less so around here.

We suspect EBF3 will eventually be known as one of NASA’s spin-offs, where Earth-bound companies take on the technology and produce commercial products with it. Perhaps it may even be used by one of the leading 3D Printer manufacturers?


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