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| Abstract No.: |
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Scheduled at:
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Wednesday, June 22, 2022, Saal Brüssel 4:20 PM
Joining of glass, ceramics and metals
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| Title: |
Laser based metallization of materials with low wettability for joining of hybrid material combinations
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| Authors: |
Dora Maischner* / Fraunhofer Institut für Lasertechnik, Deutschland
Andreas Weisheit / Fraunhofer Institut für Lasertechnik, Germany
Jan Kolberg/ EUROMAt GmbH, Germany
Ino Rass/ EUROMAT, Germany
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| Abstract: |
Soldering on ceramic, glass or oxidized metals like aluminum is difficult and often requires a metallization prior to the soldering process. In the project LaMeta EUROMAT and Fraunhofer ILT are developing a laser-based metallization process using nano/micro suspensions. Nano- and Micro-Suspensions containing a metal like silver or tin and other agents for adjusting the desired viscosity and to improve wetting are designed and applied on the surface of the substrate to be metalized via screen printing or dispensing in a layer thickness around 50 ?m. After drying at a low temperature, the layers are melted or sintered by laser radiation in a local shielding gas atmosphere. The laser technology enables, in addition to the Nano- and Micro-suspensions adapted for the laser process, local metallization with minimum heat input into the component. In contrast to a furnace process it can be integrated into a process chain. Applications can be found in areas where material combinations are used, e.g. batteries, fuel cells, heat exchangers, LED or tools. Two examples for applications are shown: The metallization of WC with silver is demonstrated for the soldering into a tool holder and the metallization of SiSiC with SnAgTi to solder water connections.
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