DRY WEAR RESISTANCE AND ITS RELATION TO THE DENSITY OF NOVEL CNT-AL NANO-COMPOSITE DEVELOPED USING AN ECONOMICAL METHOD
Publication Date : 15/04/2021
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Abstract :
A novel material was fabricated using powder metallurgy route named carbon nanotube reinforced aluminium nano-composite (CNT-Al). The percentage of CNT into the Aluminium powder varies in order to get the required amount to get the optimum results. The wear characteristic and performance of the novel material (CNT-Al) and that of pure aluminium (Al) were observed using a pin-on-disc tribometer, sliding against AISI52100 steel disc. Experimentations were taken with different sliding velocities of 0.79m/s, 0.65m/s, and 0.5m/s and a normal load of 10N, 7.2N and 5.5N in the order of lowest to highest values respectively. Pure aluminium reveals higher wear rate value compared to a novel material of CNT-Al nano-composite which reveals lower wear rate value and wear rate of all the materials examined decreases with the decrease in normal load applied. The slight increase in CNT content from 0-1.5 wt% shows a significant decrease in wear rate noted which later slightly increase at a particular value ranging from 1.5-2 wt%, then increase quickly after this array of CNT percentage in the material. From the SEM images of the worn surface of a novel material, a distinguishing adhesive and abrasive wear were confirmed. Density decreases with the addition of CNT percentage and lighter nano-composite shows better resistance to wear from the value between 0-1.5 wt% then wear resistance reduce gradually after 2 wt%.
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