3D Printing Of Metallic Structures From A Green Ink
Lebel, Louis Laberge
MetadataShow full item record
A green metallic ink is developed for 3D printing of metallic structures featuring high mechanical and electrical performances. The metallic ink consists of steel micro powders and a water-based chitosan/acetic acid polymer solution which replaces the previously used toxic polylactic acid (PLA)/dichloromethane (DCM) polymer solution. The optimized ink is printed at room temperature to build a metal/polymer hybrid structure. While printing, a fan is used to blow air over the ink filament upon extrusion to accelerate the solvent evaporation and shorten the solidification time, which significantly reduces the sagging and deformation. After a drying period at ambient conditions, the as-printed structure is then thermally treated using a furnace. The polymer binder is decomposed and the metal powders are sintered, resulting in a strong metallic structure. Melted copper is infiltrated into the sintered structure to achieve a fully dense metal/metal hybrid structure. The sintered structure exhibits high stiffness (205 GPa), electrical conductivity (9 × 105 S/m) and low filament porosity (7%).
Showing items related by title, author, creator and subject.
Nikolaev, Andrei (2019-03-05)The cyclopropanol-derived palladium-homoenolates have previously been exploited as a unique class of cross-coupling partners in our group. The major advantage of using cyclopropanols as the cross-coupling partners is the ...
Thekkoot, Sreena Raju (2016-09-20)CuxCo3-xO4 films with x values ranging from 0 to 1 have prepared in order to optimize their electrocatalytic properties for the oxygen evolution reaction (OER). Two methods have been used for the preparation of CuxCo3-xO4, ...