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3D Printing Of Metallic Structures From A Green Ink

3D Printing Of Metallic Structures From A Green Ink

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Title: 3D Printing Of Metallic Structures From A Green Ink
Author: Xu, Chao
Bouchemit, Arslane
L'Espérance, Gilles
Lebel, Louis Laberge
Therriault, Daneil
Identifier: CSME077
Abstract: 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%).
Subject: Manufacturing
3D printing
Metallic ink
Environment-friendly
Metallic structures
Secondary metal infiltration
3D printing
Metallic ink
Environment-friendly
Metallic structures
Secondary metal infiltration
Type: Article
Rights: The copyright for the paper content remains with the author
URI: http://hdl.handle.net/10315/35235
http://dx.doi.org/10.25071/10315/35235
Published: CSME-SCGM
ISBN: 978-1-77355-023-7
Date: 2018-05

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