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Numerical and Experimental Investigation on the Self‐Healing Potential of Interpenetrating Metal–Ceramic Composites

Horny, Dominik ORCID iD icon 1; Schukraft, Joél; Pieper, Carolin; Weidenmann, Kay André; Schulz, Katrin 1
1 Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM), Karlsruher Institut für Technologie (KIT)

Abstract:

An interpenetrating metal ceramic composite (IMCC) has been investigated regarding the potential as well as the feasibility of self-healing. Triggered by heating, cracks in the damaged composite located mainly in the Al2O3 ceramic or at the interface could be filled and closed by the liquid AlSi10Mg metal alloy. This healing procedure promises to reduce stress concentrations at crack tips and to improve the mechanical properties compared to the predamaged composite. Two different numerical approaches have been introduced to investigate this assumption and the potential of self-healed IMCCs for a best case scenario: 1) A simple 2D model to analyze the reduction of stress concentrations in front of a crack tip within the ceramic due to healing and 2) a 3D model based on CT-scan reconstructed microstructures to study how macroscopic mechanical properties can be restored depending on the amount of predamage. Further, the self-healing approach has been investigated experimentally for the same composite. Despite the fact that experimental self-healing of the investigated IMCC is only moderately feasible so far, the study shows the great potential that can still be exploited in order to extend the service life time of IMCC engineering components.


Verlagsausgabe §
DOI: 10.5445/IR/1000160873
Veröffentlicht am 25.07.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1438-1656, 1527-2648
KITopen-ID: 1000160873
Erschienen in Advanced Engineering Materials
Verlag Deutsche Gesellschaft für Materialkunde e.V. (DGM)
Band 25
Heft 19
Seiten Art.-Nr.: 2300259
Vorab online veröffentlicht am 03.07.2023
Schlagwörter damage modeling, interpenetrating composites, mechanical properties, self-healing
Nachgewiesen in Dimensions
Web of Science
Scopus
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