3D Printing Extremely Viscous Materials

Can materials like clay be sent through a 3D printer? Purdue University researchers have discovered a way to vibrate the print nozzle using ultrasonic waves, reducing the friction enough to allow extremely viscous materials to be printed with 100-micron precision. This allows the creation of customized solid rocket propellants, pharmaceuticals, biomedical implants, foodstuffs, and more. Courtesy of Purdue University, Mechanical Engineering.