4/1/2024 0 Comments Siloxane xps peak![]() These results indicate the tunability of the toughening behavior through suitable choice of interfacial molecular layers and polymers. Above a threshold interfacial bond strength, the toughening magnitude and frequency range are primarily controlled by the frequency- and temperature-dependent rheological properties of the polymer. We show that this unexpected frequency-dependent toughening is underpinned by nanolayer-induced interface strengthening, which facilitates load transfer to, and plasticity in, the polymer layer. Here, we demonstrate that introducing an interfacial molecular nanolayer at the metal-ceramic interface of a layered polymer-metal-ceramic stack triples the fracture energy for ~75–300 Hz loading, yielding 40% higher values than the static-loading fracture energy. Interfacial toughening in composite materials is reasonably well understood for static loading, but little is known for cyclic loading. ![]()
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