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Powder aerosol deposition : dense ceramic thick films without any heat treatment

Title data

Exner, Jörg ; Linz, Mario ; Nazarenus, Tobias ; Hanft, Dominik ; Leupold, Nico ; Glosse, Philipp ; Kita, Jaroslaw ; Moos, Ralf:
Powder aerosol deposition : dense ceramic thick films without any heat treatment.
2020
Event: young Ceramists Additive Manufacturing Forum (yCAM) 2020 , 28.10.-30.10.2020 , Online, Toulouse, France.
(Conference item: Conference , Speech )

Abstract in another language

Powder aerosol deposition (PAD), also referred to as aerosol deposition (AD) or vacuum kinetic spray (VKS), combines several advantages over conventional ceramic coating processes. Due to its unique deposition mechanism (called room temperature impact consolidation, RTIC), film formation occurs completely at room temperature, yet enables to form fully dense ceramic films without any binders nor sintering processes involved. Furthermore, a large variety of coating materials can be processed, onto almost all substrate materials. Furthermore, the mechanical properties of films like the plasma resistance or the hardness are already exceptional in the as-deposited state. These advantages, in particular the ceramic processing directly at room temperature by just spraying a dry ceramic powder, makes the powder aerosol deposition a unique technique to apply ceramic films. Typical film thicknesses range from 1 µm up to 200 µm. Due to their high quality and density, PAD films are well-suited as electrical insulation layer, as passivation layer against aggressive or oxidizing gas atmospheres or as protection film against mechanical or plasma-induced abrasion. Furthermore, the coatings exhibit a relatively even surface with typical roughness values below 1 µm. In this work, a broad overview of the PAD method is presented. Special attention is paid to PAD’s operation principle and the necessary deposition mechanism, as well as resulting film morphologies and properties. Based on various ceramic material classes (e.g. electrical insulating Al2O3 for passivating films, ionic conducting yttria stabilized zirconia for SOFC, and thermoelectric Bi2Te3 for thermoelectric generators), different aspects of PAD and the particular advantages are summarized using the example of already realized applications.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 04 Nov 2020 09:37
Last Modified: 04 Nov 2020 09:37
URI: https://eref.uni-bayreuth.de/id/eprint/59178