摘要
利用高能球磨法制备CNTs/Cu复合粉末,通过激光辅助低压冷喷涂技术在铜基体上实现球磨CNTs/Cu复合粉末的有效沉积,并对复合粉末及涂层的微观形貌、结构、元素分布及耐磨损性能进行表征。结果表明:高能球磨法能使CNTs均匀分散并嵌入塑性变形的铜粉中形成CNTs/Cu复合粉末;CNTs含量较高时,CNTs/Cu复合涂层沉积效率降低且存在孔隙和表面凹坑缺陷;复合涂层的磨痕相较于纯铜涂层更光滑,且复合涂层为粘着磨损和磨粒磨损的混合机制。
CNTs/Cu composite powder was prepared by high energy ball milling,and the effective deposition of it on Cu substrate was realized by laser-assisted low pressure cold spraying technology,and characterize the morphology,structure,element distribution and wear resistance of the composite powder and as-deposited coating.The results show that CNTs can be uniformly dispersed and embedded into the deformed Cu powder by high energy ball milling to form CNTs/Cu composite powder.When the content of CNTs in the composite powder is high,the deposition efficiency of CNTs/Cu composite powder is reduced,and there are pores and surface pits in the as-deposited coating.The wear scar of CNTs/Cu composite coating is smoother than that of pure Cu coating.The wear mechanism of CNTs/Cu composite coating is a mixture of adhesive wear and abrasive wear.
作者
田凯
刘博
邹洪森
孙景勇
李波
姚建华
TIAN Kai;LIU Bo;ZOU Hongsen;SUN Jingyong;LI Bo;YAO Jianhua(State Grid Ningxia Maintenance Company,Yinchuan 750001,China;Institute of Laser Advanced Manufacturing,Zhejiang University of Technology,Hangzhou 310023,China;Collaborative Innovation Center of High-end Laser Manufacturing Equipment,Hangzhou 310023,China;College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,China)
出处
《电加工与模具》
2021年第4期51-55,66,共6页
Electromachining & Mould
基金
国家自然科学基金资助项目(52075495)
宁夏自然科学基金资助项目(2021AAC03502)
国家电网科技有限公司科技项目(SGNXJX00BJJS2000069)。
