In this section, you can access to the latest technical information related to the FUTURE project topic.

Direct Fabrication of Metallic Micro?Gear via Electrohydrodynamic Inkjet Three?Dimensional Printing

Micro?gear is used to transmit power and motion. It is one of the key elements in various micro?devices which successfully implanted with a wide range of application areas such as microfluidic, medical equipment, and biotechnology. A variety of techniques have been developed to realize both light?weight and high?strength micro?gear manufacturing. However, those techniques often contain hazard substances with many complex procedures. Extreme conditions such as ultra?high temperature and pressure are also often required. Herein, we demonstrate a direct fabrication of a metallic micro?gear using electrohydrodynamic inkjet three?dimensional printing with silver nanoparticles. Both printing resolution and micro?gear surface morphology were enhanced by controlling printing parameters such as dot diameter and pitch. We could obtain the micro?gear with excellent surface finish. Its teeth face had an average surface roughness (Ra) of 200 nm after optimization of the printing condition. After the printing process, a post thermal curing process with different curing temperatures was conducted to improve its mechanical properties. Finally, the printed micro?gear had a hardness of 210 MPa and yield stress over 200 MPa due to silver nanoparticle aggregation during thermal curing.This article is protected by copyright. All rights reserved.

» Author: Bin Zhang, Hyungdong Lee, Doyoung Byun

» Reference: doi:10.1002/adem.201901362

» Publication Date: 08/05/2020

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