| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metal-Matrix Composites: Advances in Processing, Characterization, Performance and Analysis
|
| Presentation Title |
Design and Fabrication of a Novel Al-based Self-healing Metal-matrix Composite |
| Author(s) |
David Svetlizky, Baolong Zheng, Sen Jiang, Yizhang Zhou, Lorenzo Valdevit, Enrique J. Lavernia, Julie M. Schoenung, Noam Eliaz |
| On-Site Speaker (Planned) |
Julie M. Schoenung |
| Abstract Scope |
The concept of metallic-based self-healing materials has attracted a rapid increase of interest in recent years, yet it is in its infancy. In this Keynote talk we present a novel design of an advanced aluminum-based metal matrix composite (MMC) with self-healing characteristics. The study combines both numerical simulations with experimental work. The design concept consists of a low-melting agent, Zn-8Al (wt.%) alloy microparticles, encapsulated in a metal-based shell and embedded in an Al 5083 matrix. A two-step encapsulation process that yields a uniform, compact, and conformal Co/CoP shell on the Zn-8Al powder is demonstrated. Potential fabrication methodologies and the associated challenges are presented. The liquid-based healing process of the Al-based MMC is implemented via an external thermal treatment of the cracked specimen, which results in full melting of the encapsulated particulates to seal the crack. The first proof-of-concept of this MMC self-healing capability at the macro-scale is presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Additive Manufacturing, Surface Modification and Coatings |