According to a report on the materialsstoday website on November 16, 2020, recently, a research team led by Assistant Professor Atieh Moridi of the Seebury School of Mechanical and Aerospace Engineering at Cornell University introduced a new type of 3D technology in Applied Materials. Method of making porous metal materials.
The cold spray technology commonly used in current 3D metal printing usually sprays metal powder onto a structural member substrate at a speed of 10 meters per second, and then heats the metal to fuse the metal particles together. The heating temperature will exceed the melting point of the metal, which will cause the actual size of the structure to deviate from the initial design.
Atieh Moridi’s research team has made two improvements to the 3D printing technology: one is to increase the jet velocity of titanium alloy particles with a diameter between 45-106 microns from 10 meters per second to 600 meters per second, which has reached the supersonic standard. ; The second is to control the heating temperature of the metal at 900 °C (far lower than the melting point of titanium metal, 1626 °C). Through these improvements, the strength of the porous metal structure manufactured by the team increased by 42%.
Atieh Moridi believes that this new type of 3D printing technology has great market application potential in construction, transportation, energy and other industries.