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Influence of filler materials on the internal stresses and thermal annealing behavior of ceramic films formed by Powder Aerosol Deposition

Title data

Paulus, Daniel ; Exner, Jörg ; Kita, Jaroslaw ; Moos, Ralf:
Influence of filler materials on the internal stresses and thermal annealing behavior of ceramic films formed by Powder Aerosol Deposition.
2021
Event: PACRIM 14, The 14th Pacific Rim Conference of Ceramic Societies , 13.12.-16.12.2021 , Vancouver (virtual), USA.
(Conference item: Conference , Speech )

Abstract in another language

The Powder Aerosol Deposition (PAD) method is a novel method to produce ceramic films at room temperature. During the coating process, a ceramic powder forms an aerosol and is transferred to a vacuum deposition chamber. Particles are accelerated by a nozzle and subsequently impact on a substrate where a dense film is formed. PAD films typically bear a high internal compressive stress up to 2.5 GPa as an intrinsic feature. Firstly, this stress may lead to a film delamination in case of high film thicknesses, if the interface of film and substrate cannot withstand the occurring shear stress. Secondly, film stresses cause a significant deterioration of electric properties like the electronic or ionic conductivity. Thermal annealing diminishes the internal stress and regains high electrical properties, yet this treatment opposes to the advantage of PAD of ceramic room temperature processing. In this work, the influ-ence of a filler material on the formation of the internal stress and the annealing behavior of Yttrium stabilized Zirconia (8YSZ) films is investigated. Here, different fillers with varying properties were used to deposit composite films by Aerosol Co-Deposition using powder mixtures. Results describe the change of the internal stress (microstrain) and electrical annealing behavior in dependence of the filler content.

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: 21 Dec 2021 08:39
Last Modified: 21 Dec 2021 13:53
URI: https://eref.uni-bayreuth.de/id/eprint/68211