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Nanomechanical characterization of a metal matrix composite reinforced with carbon nanotubes

1 Facultad de Ingeniería Aeronáutica, Universidad Pontificia Bolivariana, Medellín, Colombia
2 Design of Advanced Composites (DADCOMP), Universidad Nacional de Colombia, Facultad de Minas, Departamento de Materiales y Minerales, Cl 75 No 79A 51, 050032, Medellín, Colombia
3 Departamento de Ciencias Básicas, Universidad Católica Luis Amigó, Medellín, Colombia
4 Grupo GIIEN, Facultad de Ingeniería, Institución Universitaria Pascual Bravo, campus Robledo, Medellín, Colombia

A new technique for the manufacture metal matrix composites has recently been developed. This technique produces a structure of a metallic matrix banded structured-layers of multiwall carbon nanotubes by a diffusive processes. To understand the increase in the volumetric mechanical properties of the composite and the dispersion of the nano-reinforcement, a nanomechanical characterization was performed by nanoindentation and atomic force microscopy. From the mechanical tests performed, a stiffness and elastic modulus maps were made near the reinforced areas, then the dispersion of the nano-reinforcements and the homogeneity of the mechanical properties were accessed. The results showed an increase in the modulus of elasticity of up to 150%; and a good dispersion of the nano-reinforcements in the reinforced zone, which demonstrates the feasibility of the alternative manufacturing process for increasing the mechanical properties of the composite.
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