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Investigating the Feasibility of Preparing Metal-Ceramic Multi-Layered Composites Using Only the Aerosol-Deposition Technique.

ABSTRACT: 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 Al₂O₃/Al/Al₂O₃/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 Al₂O₃ dielectric layer provides excellent electrical resistance (i.e., 7.7 × 10¹² Ω∙m), which is required for reliable electric field applications.

SUBMITTER: Sadl M

PROVIDER: S-EPMC8400038 | biostudies-literature |

REPOSITORIES: biostudies-literature

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