Investigation on Wear Behaviour of Nano B4C Reinforced Composite with Zn Alloy Matrix
摘要
The current investigation employed a pin-on-disc wear testing setup to explore the effects of incorporating modest amounts of nano B4C on the wear behavior and coefficient of friction of a Zn alloy (85Zn-15Sn). The study delved into the performance of the Zn-Sn alloy under varying pressures (10, 20, 30, and 40 N) and sliding speeds (1.4, 1.8, 2.3, and 2.8 m/s) over a constant sliding distance of 2000 m. Wear rate characterization, along with coefficient of friction measurements, was conducted, supplemented by microanalysis utilizing SEM/EDX to examine the matrix and worn surfaces. The findings reveal that the wear rate of the Zn alloy increases with higher pressures, sliding speeds, and distances across all tested scenarios. However, the introduction of an 8 wt% B4C addition to the Zn alloy brings about a reduction in wear rate during testing. This reduction is attributed to the partial refinement of Zn dendrites and the precipitation hardening of solid solutions. Examination of the worn surfaces suggests that the sliding process leads to the formation of a substantial oxide layer, contributing to enhanced tribological performance.