Effect of Carbon Nanotube (CNT) Content on the Hardness, Wear Resistance and Thermal Expansion of In-Situ Reduced Graphene Oxide (rGO)-Reinforced Aluminum Matrix Composites

Peter Nyanor; Omayma El‑Kady; Hossam M. Yehia; Atef S. Hamada; Koichi Nakamura; Mohsen A. Hassan

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자료유형: 학술저널

저자정보: Peter Nyanor (Egypt-Japan University of Science and Technology) Omayma El‑Kady (Central Metallurgical Research and Development Institute) Hossam M. Yehia (Helwan University) Atef S. Hamada (Egypt-Japan University of Science and Technology) Koichi Nakamura (Egypt-Japan University of Science and Technology) Mohsen A. Hassan (Egypt-Japan University of Science and Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.5

발행연도: 2021.1

수록면: 1,315 - 1,326 (12page)

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Aluminum matrix composites reinforced with reduced graphene oxide (rGO) and hybrid of carbon nanotube (CNT) andrGO are fabricated by solution coating powder metallurgy process. The hardness, wear resistance and coefficient of thermalexpansion (CTE) of the reinforced aluminum composites and the associated microstructural changes with rGO range(0.2–0.6 wt%) and hybrids of 0.2 wt% CNT–rGO at different ratios have been investigated. The intensive microstructuralobservations show that rGO is adsorbed on Al particles and uniformly distributed in the Al matrix composites. The hardnessvalues of the composites increase significantly with rGO reinforcement exhibiting the maximum hardness at 0.4 wt% rGO.Compared with the hybrid composites CNT–rGO/Al counterparts fabricated by the same route and wt. percent of 0.2, thehardness values in the hybrid CNT–rGO increase considerably. Similar to the hardness, the results of wear tests also exhibitcorresponding variation in the values of the wear rates. The improvement in the wear resistance of the hybrid CNT–rGO /Alcomposite is pronounced in this work. Whereas the rGO reinforcements decrease significantly the wear rate of the aluminumbaseby 98%, the wear resistance of the corresponding hybrid CNT–rGO is significantly higher than that of the precedingcomposites. Maximum CTE reduction of 28% was recorded for hybrid CNT–rGO (1:1) reinforced composite.

#Aluminum matrix composite · Hybrid CNTs–graphene oxide · Wear resistance · Hardness · Powder metallurgy

참고문헌 (57)

참고문헌 신청

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