Carbon nanotubes used to enhance the wear properties of AlSi10Mg/CNTs nanocomposites prepared through additive manufacturing

Abstract

In this work, varying weight percentages of carbon nanotubes (CNTs) were reinforced in the AlSi10Mg alloy, and prepared nanocomposites through additive manufacturing. The distribution of CNTs in the metal matrix were achieved through functionalization and ball milling. The dispersion of CNTs were investigated through FESEM, TEM, and Raman spectroscopy. To study the wear properties, the prepared samples underwent wear tests at various loads and speeds. The wear properties, worn surfaces, and microhardness were thoroughly investigated. The results unveiled that the incorporation of CNTs led to a decrease in the wear rate and a reduction in the coefficient of friction. It was observed that CNTs functioned as a solid lubricant, resulting in a significant reduction in both the coefficient of friction and wear rate. The microstructures of the worn surfaces and wear channels became smaller and smoother after the addition of CNTs, and smaller-sized debris was produced.