In this study, an investigation was conducted to assess the influence of nanoscale boron carbide (nB₄C) particles on the mechanical and tribological properties of AA6063 matrix composites. Using a mechanical stirrer, researchers mixed together AA6063 matrix composites with various amounts of nB₄C (from 0 to 2.0 wt.%). The experimental results demonstrated that the addition of nB₄C not only increased the elastic modulus of the material but also led to an enhancement in its brittle behavior, consequently reducing the failure strain significantly. Furthermore, the addition of nB₄C exhibited notable improvements in the shear modulus and flexural shear modulus of the composites. Notably, the introduction of nB₄C into the AA6063 matrix resulted in reduced subsurface fatigue wear and increased wear resistance, attributed to the beneficial lubricating properties of B₄C. Various tests were conducted to evaluate parameters such as wear, microstructure, morphology, density and voids, hardness, flexural and tensile strength. The results indicated that the addition of nB₄C led to enhanced wear resistance and tensile strength in the composites. Specifically, the highest wear resistance and tensile strength were achieved with the inclusion of 2 wt.% nB₄C in the aluminum (Al) metal matrix composite. Microscopical analysis further revealed a consistent and uniform distribution of B₄C particles throughout the Al matrix, indicating a promising dispersion of the reinforcement material within the composite.

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