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

Title data

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. Vol. 10 (2017) Issue 4 . - Art.Nr. 1750045.
ISSN 1793-7213
DOI: https://doi.org/10.1142/S179360471750045X

Project information

Project title:
Project's official titleProject's id
No informationAZ-1055-12

Project financing: Bayerische Forschungsstiftung (BFS)

Abstract in another language

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.

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: 04 Sep 2017 12:12
Last Modified: 04 Sep 2017 12:12
URI: https://eref.uni-bayreuth.de/id/eprint/38723