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- Title
Characterisation of high-temperature jet break-up for ceramic sphere production.
- Authors
Leys, Oliver; Waibel, Patrick; Matthes, Jörg; Keller, Hubert; Knitter, Regina
- Abstract
The effect of the operating pressure on the droplet formation dynamics of a molten laminar jet was studied using a high-speed camera. A melt was formed in a platinum alloy crucible at 1380 °C, after which a pressure was applied to the system to form a jet through a 300 μm nozzle. The molten jet breaks up into droplets as described by the Plateau-Rayleigh theory, which are then solidified using liquid nitrogen to form small ceramic spheres. A high-speed camera was positioned directly below the nozzle to obtain footage for a full range of operating pressures at 3500 frames per second, which was then analysed using image processing methods. An optimum operating pressure was found at which the desired instabilities grow the fastest and the variance between the droplet spacing is at a minimum. This resulted in an increased yield and a narrower size distribution of the final product.
- Subjects
CERAMICS; ELECTRON-hole droplets; IMAGE processing; IMAGING systems; RAYLEIGH-Plateau instability
- Publication
International Journal of Advanced Manufacturing Technology, 2018, Vol 98, Issue 9-12, p2311
- ISSN
0268-3768
- Publication type
Article
- DOI
10.1007/s00170-018-2378-y