5 Werkstofftechnik
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Organisationseinheit der BAM
- 5 Werkstofftechnik (51)
- 5.1 Mikrostruktur Design und Degradation (19)
- 5.4 Multimateriale Fertigungsprozesse (13)
- 6 Materialchemie (7)
- 5.3 Polymere Verbundwerkstoffe (6)
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- 5.0 Abteilungsleitung und andere (5)
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- 8 Zerstörungsfreie Prüfung (4)
- 5.2 Metallische Hochtemperaturwerkstoffe (3)
Paper des Monats
- ja (1)
The influence of the atomization technique on the suitability of granules for dry pressing is the focus of the presented investigations. Therefore, destabilized alumina, zirconia, and zirconia toughened alumina (ZTA) slurries were spray dried and the obtained granules were used to fabricate green and finally sintered bodies for evaluation.
Granules made in a laboratory spray dryer with a two-fluid nozzle served as a reference. An ultrasonic atomizer was integrated into the same spray dryer and the influence on the granule properties was evaluated. Untapped bulk density, granule size distribution, and flowability are among the evaluated granule-related properties as well as the granule yield which is used as an indicator of the process efficiency.
Yield and flowability as most important granule properties are clearly improved when atomization is realized with ultrasound. The investigated sinter body properties include porosity, sinter body density, and biaxial strength and are as well positively affected by switching the atomization technique to ultrasound. Therefore, the Approach to improve the compressibility of granules by ultrasonic atomization, which leads to an improved microstructure, density, and strength of sintered bodies, has proven to be successful for single-component ceramics (alumina and zirconia) as well as for the multicomponent ceramic ZTA.