|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|Evolution of Phases and Interfaces in Self-healing Composites Made of Al5083 Matrix and Encapsulated ZnAl Particles
|Baolong Zheng, Xin Wang, David Svetlizky, Lorenzo Valdevit, Noam Eliaz, Enrique J. Lavernia, Julie M. Schoenung
|On-Site Speaker (Planned)
Self-healing materials have the capability to repair cracks generated in the components under external stimuli, such as heat, solvents, deformation, etc. Aluminum alloy matrix composites containing encapsulated ZnAl particles have been designed by Svetlizky and Eliaz as metallic self-healing materials. Here, we report on the investigation of Al5083 based composites reinforced with core-shell ZnAl/Co particles consolidated using spark plasma sintering (SPS). The phase transition and interface between the Co shell coating and the ZnAl core plays an important role in determining the integrity, diffusion, and self-healing ability of encapsulated ZnAl. To gain better understanding of the self-healing function of the Al5083 + ZnAl/Co composite, the interface evolution and phase transition around the coating and the cracks after self-healing were investigated using (scanning) transmission electron microscopy (S/TEM) and X ray diffraction (XRD). The microstructure evolution is also rationalized based on the thermal history during SPS sintering and self-healing heat treatment processing.
|Composites, Phase Transformations, Powder Materials