Abstract
In order to investigate the nanomechanical behaviors and nanotribological properties of bicomponent epoxy resin (BE) blends, which were filled with thermoplastic polyaryletherketone (PAEK) powders, nanoindentation and nanoscratch tests were performed. The brittle fractured morphologies of bicomponent epoxy resin blends were studied. The microhardness and elastic modules of the materials were measured using the nanoindentation technology. The hardness, elastic modulus, and other mechanical properties of materials on a nanoscale were determined. Nanoindentation and scratch experiments showed that the indentation response is dominated by plastic deformation. The microhardness is the lowest as the content of PAEK powders is increased to 30 parts per hundred parts of resin (phr), while that of the neat bicomponent epoxy resin specimen is the highest. Furthermore, the pristine bicomponent epoxy resin (BE) exhibited better load-carrying and indentation recovery capacity than the other three samples. The nanoscratch results indicate that the frictional coefficient of the BE/PAEK-30 blend is the lowest, and while that of the pristine bicomponent epoxy resin is the highest, with better scratch/wear resistance.
Highlights
With the development of precision and ultra-precision machining technology, many microstructures are applied in engineering practice
In order to meet further requirements, the two epoxy resins mentioned above were prepared into a new blend system (BE), which can provide a series of excellent mechanical properties, such as high strength, hardness, modulus, and fracture toughness [14]
Cured epoxy samples were recorded as bicomponent epoxy resin (BE), PAEK-10/BE, PAEK-20/BE, PAEK-30/BE, and PAEK-40/BE specimens, respectively
Summary
With the development of precision and ultra-precision machining technology, many microstructures are applied in engineering practice. Nanoindentation technology was widely used in the study of the nano-mechanical properties of materials in the past 10 years due to its lower invasiveness in a small local area [3] These techniques can record load and depth continuously to evaluate the nanomechanical and tribological properties of a solid material based on the local deformation [4]. In order to meet further requirements, the two epoxy resins mentioned above were prepared into a new blend system (BE), which can provide a series of excellent mechanical properties, such as high strength, hardness, modulus, and fracture toughness [14]. Very few studies focused on the nanomechanical behaviors and tribological properties of bicomponent high-performance epoxy resin and various blends. Cured epoxy samples were recorded as BE, PAEK-10/BE, PAEK-20/BE, PAEK-30/BE, and PAEK-40/BE specimens, respectively
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