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Fractography analysis of 0.5 wt% multi-layer graphene/nanoclayreinforced epoxy nanocomposites

Northumbria University, Faculty of Engineering and Environment, Department of Mechanical andConstruction Engineering, Newcastle upon Tyne NE1 8ST, United Kingdom

Topical Section: 2D Materials

The topographical features of fractured tensile, flexural, K1C, and impact specimens of0.5 wt% multi-layer graphene (MLG)/nanoclay-epoxy (EP) nanocomposites have been investigated.The topographical features studied include maximum roughness height (Rmax or Rz),root meansquare value (Rq), roughness average (Ra), and waviness (Wa).Due to the deflection and bifurcationof cracks by nano-fillers, specific fracture patterns are observed. Although these fracture patternsseem aesthetically appealing, however, if delved deeper, they can further be used to estimate theinfluence of nano-filler on the mechanical properties. By a meticulous examination of topographicalfeatures of fractured patterns, various important aspects related to fillers can be approximated such asdispersion state, interfacial interactions, presence of agglomerates, and overall influence of theincorporation of filler on the mechanical properties of nanocomposites. In addition, treating thenanocomposites with surfaces of specific topography can help improve the mechanical properties ofnanocomposites.
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