About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Behavior at the Nanoscale VII
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Presentation Title |
In-Plane Fatigue Behavior of 2D Hybrid Organic-Inorganic Perovskites for Long-Term Relability |
Author(s) |
Doyun Kim, Eugenia S. Vasileiadou, Ioannis Spanopoulos, Xuguang Wang, Jinhui Yan, Mercouri G. Kanatzidis, Qing Tu |
On-Site Speaker (Planned) |
Qing Tu |
Abstract Scope |
We systematically investigate the fatigue behavior of (C4H9-NH3)2(CH3NH3)2Pb3I10, a archetype 2D hybrid organic-inorganic perovskite (HOIP), by atomic force microscopy stretching suspended 2D membranes. This 2D HOIP can survive over 1 billion cycles, more resilient than polymers, probably due to a plastic deformation mechanism discovered in these ionic hybrid materials. The failure morphology indicates that 2D HOIPs tend to exhibit brittle failure at high mean stress levels but behave as ductile materials at low mean stress levels. The stiffness and strength of 2D HOIPs are gradually weakened under subcritical loading, potentially as a result of stress-induced defects accumulating and nucleating, which can be accelerated by the cyclic loading component. The fatigue lifetime of 2D HOIPs can be extended by reducing the mean stress, stress amplitude, or increasing the thickness. Our results can provide indispensable insights into designing and engineering 2D HOIPs and other hybrid organic-inorganic materials for long-term mechanical durability. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Nanotechnology, Electronic Materials |