Influence of Temperature Variation on Tribological Behavior of Aluminum Matrix Hybrid Composites: A Statistical Analysis

The influence of temperature variation on tribological behavior of the Al 6061-10 wt.% B₄C mono composite, Al 6061-10 wt.% B₄C-7.5 wt.% Gr hybrid composite, and Al 6061-10 wt.% B₄C-7.5 wt.% MoS₂ hybrid composite was statistically analyzed in this work. The tribological studies were conducted using a high-temperature tribometer of pin-on-disk configuration, and the experiments were designed using full factorial design experimental scheme. Analysis of variance of the wear rate and friction coefficient (responses) of the hybrid composites revealed that the factors A (solid lubricant particles addition) and B (temperature) were statistically significant to influence the responses. The main effects plots revealed that the responses decreased with the addition of solid lubricant particles and increased with temperature in the range of 100-250 °C. The scanning electron microscopy analysis revealed the formation of tribolayer at 100 °C and induction of delamination and abrasion wear mechanisms.