Abstract
The research focuses on the preparation, microstructure, and tribological properties of AlSi10Mg composites, reinforced with 10 wt.% TiB₂ particles and 2 wt.% graphene nanoplatelets (GNPs). The composites were prepared using the “Spark Plasma Sintering” (SPS) method to achieve high density and maintain the integrity of the added phases. Microstructural analysis confirmed the successful incorporation of TiB₂ and GNPs into the aluminum matrix. The addition of TiB₂ led to an increase in hardness and wear resistance. The addition of GNPs resulted in a further increase in hardness, a decrease in wear rate, and a significant reduction in the friction coefficient. Surface analysis revealed that the GNPs create a continuous and stable friction layer on the contact surface during the sliding test. This layer effectively prevents direct metal-to-metal contact, thereby changing the dominant wear mechanism from abrasive and adhesive to delamination, which reduces friction losses.

Key words
aluminum matrix composites, TiB₂, graphene nanoplatelets, spark plasma sintering, wear

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