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논문 기본 정보

자료유형
학술저널
저자정보
J. S. S. Babu (Pusan National University) A. Srinivasan (CSIR) Chung Gil Kang (Pusan National University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.9
발행연도
2021.9
수록면
3,666 - 3,680 (15page)
DOI
10.1007/s12540-020-00787-6

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In this article, the tribological properties of aluminum/MWCNTs/Al2O3sf hybrid composites with varying volume fractionof 10 vol%, 15 vol% and 20 vol% was investigated under dry sliding conditions. The experiments were performed accordingto design of experiments approach using Taguchi method to predict the wear properties of composites. The results indicatedthat the composites of 15 vol% had lower wear loss, whereas the coefficient of friction (COF) decreased significantly at 20vol%. Taguchi based ANOVA analysis showed that the sliding distance was found to be the prominent factor controllingthe wear loss; applied load influenced COF most significantly. It could also be noticed that the COF and wear loss increaseswith an increase in sliding load and sliding distance. The decrease in wear loss and the COF can be attributed to the selflubricationeffect of MWCNTs, and the combined effect of reinforcements in the composites. In addition, nanoscratch testwas performed to determine the COF and the effect of the reinforcements on local regions of the composites. The resultsrevealed that higher friction force was obtained near the regions of MWCNTs and Al2O3sfwhile nanoscratching. The COFof composites of 20 vol% was found to slightly higher compared to that of 10 vol% and 15 vol%. This is attributed to thepresence of MWCNTs cluster within the Al2O3sfnetwork results prevent the micro-plastic deformation of Al matrix, and theformation of tribofilms with nanoscaled thickness in the scratch region. These friction and wear results indicate that the presenceof a limited amount and size of MWCNTs clusters are beneficial to the tribological properties of the hybrid composites.

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