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How to treat powders for the room temperature aerosol deposition method to avoid porous, low strength ceramic films

Title data

Exner, Jörg ; Schubert, Michael ; Hanft, Dominik ; Kita, Jaroslaw ; Moos, Ralf:
How to treat powders for the room temperature aerosol deposition method to avoid porous, low strength ceramic films.
In: Journal of the European Ceramic Society. Vol. 39 (2019) Issue 2-3 . - pp. 592-600.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2018.08.008

Project information

Project title:
Project's official titleProject's id
Forschungsverbund ForOxiE2AZ-1143-14

Project financing: Bayerische Forschungsstiftung

Abstract in another language

Aerosol deposition features the formation of dense and well adhering ceramic films directly at room temperature, without the need of any heat treatment during or after the deposition. While these claims are true for a suitable ceramic powder, the success of the film deposition is highly dependent on the right choice of the powder. Beside the commonly stated particle size that should be in the sub-micrometer to micrometer range, other influencing powder parameters exist, some of which have not yet been fully identified. In this work, ceria nanopowders were thermally pretreated and the quality of subsequent sprayed films was observed. A minimum crystallite size in the powder was determined in order to enable the underlying deposition mechanism. Furthermore, the conversion of kinetic particle energy to the formation of surface energy during impact was estimated. A first universal behavior is found leading to a recommendation for a suitable AD powder preparation.

Further data

Item Type: Article in a journal
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
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 07 Nov 2018 08:28
Last Modified: 07 Nov 2018 08:28
URI: https://eref.uni-bayreuth.de/id/eprint/46245