A team led by Cornell University has developed a technique called “cold spray.” This technique could produce “mechanically robust, porous structures that are 40% stronger than similar materials made with conventional manufacturing processes.” Aside from that, they can also make these structures much faster.
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The structures’ small size and porosity make them particularly well-suited for building biomedical components, like replacement joints.
The team’s paper, “Solid-State Additive Manufacturing of Porous Ti-6Al-4V by Supersonic Impact,” published Nov. 9 in Applied Materials Today.
The paper’s lead author is Atieh Moridi, assistant professor in the Sibley School of Mechanical and Aerospace Engineering.
The particles were between 45 and 106 microns in diameter (a micron is one-millionth of a meter) and traveled at roughly 600 meters per second, faster than the speed of sound. To put that into perspective, another mainstream additive process, direct energy deposition, delivers powders through a nozzle at a velocity on the order of 10 meters per second, making Moridi’s method sixty times faster.
More details about this over at PHYS.org.
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(Image Credit: Cornell University/ PHYS.org)