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Effect of substrate hardness and surface roughness on the film formation of aerosol-deposited ceramic films


Schubert, Michael ; Hahn, Manuel ; Exner, Jörg ; Kita, Jaroslaw ; Moos, Ralf:
Effect of substrate hardness and surface roughness on the film formation of aerosol-deposited ceramic films.
In: Functional Materials Letters. Bd. 10 (2017) Heft 4 . - Art.Nr. 1750045.
ISSN 1793-7213
DOI: https://doi.org/10.1142/S179360471750045X

Angaben zu Projekten

Offizieller ProjekttitelProjekt-ID
Ohne AngabeAZ-1055-12

Projektfinanzierung: Bayerische Forschungsstiftung (BFS)


The aerosol deposition (AD) method is a novel ceramic coating technique that allows manufacturing of dense ceramic films at room temperature directly from ceramic powders without any high temperature sintering steps and without expensive (ultra) high vacuum processes. The deposition mechanism can be separated into two stages: the creation of an anchor layering and the subsequent film formation. Step one involves an initial plastic deformation of the substrate surface by the first impacting particles. Especially in the first stage, substrate properties affect the deposition and determine the dominant bonding mechanism. Ductile substrates can be expected to give strong film anchoring, whereas high hardness substrates might require higher particle velocities to form adhering layers. In this study, the influence of the substrate hardness in combination with the surface roughness on the deposition was investigated. Four ceramic substrates (two types of Al2O3, sapphire, and LTCC) with different hardness and surface roughness were coated with Al2O3 in order to study the formation of an anchoring layer and their effect on the deposition rate. As a result, no anchoring layer was found on the hard ceramic substrates.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder > Advanced Fields
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 04 Sep 2017 12:12
Letzte Änderung: 04 Sep 2017 12:12
URI: https://eref.uni-bayreuth.de/id/eprint/38723