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A High Temperature Drop-On-Demand Droplet Generator for Metallic Melts.
Saeedeh Imani Moqadam1,2, Lutz Mädler1,2, Nils Ellendt3,4
1Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, 28359 Bremen, Germany.
Micromachines
|July 20, 2019
Summary
This study introduces a high-temperature pneumatic droplet generator for metallic microparticles. The system reproducibly produces steel particles (300-1350 µm) at 1600 °C, controlled by in-situ measurements.
Area of Science:
- Materials Science
- Mechanical Engineering
- Physics
Background:
- Producing metallic microparticles at high temperatures presents significant challenges.
- Precise control over particle size and morphology is crucial for advanced material applications.
Purpose of the Study:
- To design and demonstrate a pneumatic drop-on-demand droplet generator for metallic microparticles.
- To achieve reproducible production of microparticles at temperatures up to 1600 °C.
- To characterize the generated particles and understand the droplet formation process.
Main Methods:
- Utilized a pneumatic drop-on-demand system for molten metal droplet generation.
- Employed EN 1.3505 (AISI 52100) steel for droplet production.
- Analyzed particle size and morphology via static image analysis.
- Investigated droplet formation using high-speed videography and in-situ pressure measurements.
Main Results:
- Successfully generated metallic microparticles with sizes ranging from 300 µm to 1350 µm.
- Achieved stable droplet formation and solidification at temperatures up to 1600 °C.
- Demonstrated reproducibility in particle size and trajectory control through in-situ measurements.
Conclusions:
- The developed pneumatic droplet generator is effective for producing high-quality metallic microparticles at extreme temperatures.
- In-situ monitoring and control are key to achieving reproducible particle characteristics.
- The system provides a foundation for scalable manufacturing of specialized metallic powders.
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