Microstructure and mechanical properties of Al matrix composites synergistically reinforced by Cu layer-coated CNTs and in situ nano reinforcement
The Al-CNTs(Cu)-CuO composites were prepared by rapid hot-press sintering method using pure aluminum powder,CuO powder and Cu-coated encapsulated CNTs as raw materials,and the effects of different mass fractions of CuO on the characteristics of the in situ precipitates as well as the mechanical and wear properties of the reinforced aluminum matrix composites were investigated.The results show that with the increase of CuO content in the aluminum matrix composites,the in situ precipitation of Al2Cu and Al2O3 in the Cu coated CNTs reinforced aluminum matrix composites is significantly promoted,which not only makes the aluminum matrix composites have higher strength-toughness match,but also reduces the wear rate and improves the wear-resistant properties of the composites.The synergistic reinforcement of Cu coated CNTs and in situ formed nano reinforcements can effectively improve the service performance of aluminum matrix composites,which makes them have a broad application prospect in the fields of aerospace and rail transportation.
aluminum matrix compositescarbon nanotubesin-situ solid-state reactionmechanical propertiesfriction and wear
余炜琳、孙天宇、喻惠望、郭柏松
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暨南大学先进耐磨蚀及功能材料研究院,广东广州,510632
铝基复合材料 碳纳米管 原位固相反应 力学性能 摩擦磨损
国家自然科学基金资助项目广东省科技计划项目National Natural Science Foundation of China
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