添加碳纳米管和粉煤灰对铝金属基复合材料磨损和摩擦性能的影响

Udaya Devadiga, Peter Fernandes, A. Buradi, Addisu Frinjo Emma
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摘要

为了改善铝金属基复合材料的磨损和摩擦性能,添加了碳纳米管和粉煤灰作为增强材料。混合金属基复合材料的制造采用了粉末冶金技术。实验采用针盘式磨损试验台进行。分析实验结果表明,与纯铝和单增强体组合相比,混合金属基复合材料的磨损损失和摩擦系数大大降低。与纯铝相比,添加 0.25、0.5 和 0.75 wt% 的碳纳米管(CNT)后,磨损率分别降低到 89.58%、86.97% 和 83.3%。在纯铝中添加 4、8 和 16 wt% 的 FA 后,磨损率分别降至 83.85%、89.58% 和 78.12%。研究还发现,与 Al/8 wt% FA 单体增强复合材料相比,添加 0.25、0.5 和 0.75 wt% CNT 后,磨损率分别降低到 77%、71.26% 和 53.22%。与 Al/0.25 wt% CNT 复合材料相比,添加 4、8、16 wt% FA 后,磨损率分别降低到 81%、88% 和 75%。磨损表面的微观结构研究表明,铝金属基体中碳纳米管和粉煤灰的存在降低了磨损和粘着磨损。此外,还讨论了磨损和摩擦性能的强化机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Significance of addition of carbon nanotubes and fly ash on the wear and frictional performance of aluminum metal matrix composites
In order to improve the wear and frictional behavior of the aluminum metal matrix composites, carbon nanotube, and fly ash were added as reinforcements. Powder metallurgy technique was used to fabricate the hybrid metal matrix composites. Experimentations were carried out using pin on disc type wear test rig. The analyzed experimental results showed that, in comparison to the pure aluminum and mono reinforcement combination, the wear loss and coefficient of friction of hybrid metal matrix composites were greatly reduced. It was noted that compared to pure aluminum wear loss was decreased to 89.58%, 86.97%, 83.3% by adding 0.25, 0.5, 0.75 wt% carbon nanotube (CNT), respectively. By the addition of 4, 8 and 16 wt% FA to pure Al wear loss was decreased to 83.85%, 89.58%, and 78.12%, respectively. It was also noted that compared to Al/8 wt% FA mono reinforced composites, wear loss was decreased to 77%, 71.26%, and 53.22% with the addition of 0.25, 0.5, 0.75 wt% CNT, respectively. With the addition of 4, 8, 16 wt% FA, wear loss decreased to 81%, 88%, and 75% over Al/0.25 wt% CNT composites, respectively. The microstructural study of the worn‐out surfaces revealed low abrasive and adhesive wear by the presence of carbon nanotubes and fly ash in aluminum metal matrix. The reinforcing mechanisms of the wear and frictional properties were also discussed.
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