Silicon dioxide has eight stable crystalline phases at conditions of the Earth's rocky parts. Many metastable phases including amorphous phases have been known, which indicates the presence of large kinetic barriers. As a consequence, some crystalline silica phases transform to amorphous phases by bypassing the liquid via two different pathways. Here we show a new pathway, a fracture-induced am...

Al2O3 + 30 vol% ZrO2 matrix composites with 20 and cBN have been prepared the optimized processing route, using spark plasma sintering (SPS) at temperatures of 1400 °C 1250 °C. The influence addition on microstructure characteristics, micro/nanohardness, elastic modulus, crack-extension resistance their constitutions investigated scanning electron microscopy (SEM), statistical analyses individu...

Interleaving thermoplastic veils has proved to enhance the interlaminar fracture toughness of carbon fibre/epoxy composites under static loading conditions. However, fatigue delamination behaviour yet be investigated. Herein, meltable Polyamide-12 (PA) and non-meltable Polyphenylene-sulphide (PPS) were used for interlay toughening unidirectional (UD) non-crimp fabric (NCF) laminates that manufa...

This paper explores fundamental mechanisms of negatively thermodynamic toughening during microphase separations double network (DN) hydrogels, which have dynamically coordinating components with adjustable swelling behavior and designable multi-shape memory effect (multi-SME). Based on the Flory–Huggins theory Fick's second law, a model is formulated to study diffusive dynamics, cooling-trigger...

Abstract The mechanisms of reinforcement an epoxy resin by the addition graphene nanoplatelets (GNPs) has been studied in detail. It is found that GNPs increases both stiffness and fracture toughness resin. dependence flexural modulus upon volume fraction modelled using a combination rule mixtures shear lag analysis it shown controlled principally aspect ratio (length/thickness) GNPs. energy GN...

Nanoparticles have been widely used to enhance mechanical properties of polymer matrix, however, the complex mechanisms interfacial entanglements, coupled confinements and coordinative motions among macromolecules nanoparticles not well understood. In this study, we develop a coupling model describe thermodynamic entanglements confinement effects within nanoparticle reinforced shape memory (SMP...

We examine the microscopic toughening mechanisms and their effect on the macroscopic failure response of heterogeneous adhesives made of stiff particles embedded in a more compliant matrix. The analysis relies on a multi-scale cohesive framework first described in Matouš et al. [Matouš, K., Kulkarni, M., Geubelle, P., 2008. Multiscale cohesive failure modeling of heterogeneous adhesives. Journa...

The ability to create architected materials that possess both high stiffness and toughness remains an elusive goal, since these properties are often mutually exclusive. Natural materials, such as bone, overcome such limitations by combining different toughening mechanisms across multiple length scales. Here, a new method for creating architected lattices composed of core-shell struts that are b...