Investigating the feasibility of preparing metal-ceramic multi-layered composites using only the aerosol-deposition technique

Šadl, Matej (author), Tomc, Urban (author), Uršič Nemevšek, Hana (author)

The preparation of metal–ceramic layered composites remains a challenge due to the incompatibilities of the materials at the high temperatures of the co-firing process. For densification, the ceramic thick-film materials must be subjected to high-temperature annealing (usually above 900 °C), which can increase the production costs and limit the use of substrate or co-sintering materials with a low oxidation resistance and a low melting point, such as metals. To overcome these problems, the feasibility of preparing dense, defect-free, metal–ceramic multilayers with a room-temperature-based method should be investigated. In this study, we have shown that the preparation of ceramic–metal Al$_2$O$_3$/Al/Al$_2$O$_3$/Gd multilayers using aerosol deposition (AD) is feasible and represents a simple, reliable and cost-effective approach to substrate functionalisation and protection. Scanning electron microscopy of the multilayers showed that all the layers have a dense, defect-free microstructure and good intra-layer connectivity. The top Al$_2$O$_3$ dielectric layer provides excellent electrical resistance (i.e., 7.7 × 10$^{12}$ Ω·m), which is required for reliable electric field applications.

• Language: English
• Keywords: aerosol deposition, multi-layered composites, interdigitated aluminium electrodes, alumina insulating layers
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 10 str.
• Numbering: Vol. 14, iss. 16, art. 4548
• PID: 20.500.12556/RUL-135970
• UDC: 621.79:62-419:544.772
• ISSN on article: 1996-1944
• DOI: 10.3390/ma14164548
• COBISS.SI-ID: 72970755
• Publication date in RUL: 05.04.2022

Record is a part of a journal

• Title: Materials
• Shortened title: Materials
• Publisher: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 13.08.2021

Secondary language

• Language: Slovenian
• Keywords: aerosolno nanašanje, večslojni kompoziti, povezane aluminijeve elektrode, aluminijevi izolirni sloji