We love our 3D printers. But sometimes we really wish we could print in metal. While metal printing is still out of reach for most of us, HRL Labs announced a powdered aluminum printing process that they claim is a breakthrough because it allows printing (and welding) of high-strength aluminum alloys that previously were unprintable and unweldable.
The key is treating the metal with special zirconium-based nanoparticles. The nanoparticles act as nucleation sites that allow the aluminum to form the correct microstructure. The full paper on the process appears in Nature.
Other than the nanoparticles, the process is a conventional …read more http://pje.fyi/PqL8PN