镍基碳纳米管复合电沉积薄膜的制备和机械性能分析  

Electrodeposition and Mechanical Characterization of Ni-carbon Nanotubes Composite Coatings

作　　者：诸利达[1] 丁桂甫[1] 刘瑞[1] 汪红[1] 李雪萍[1] 

机构地区：[1]微米/纳米加工技术国家重点实验室薄膜与微细技术教育部重点实验室上海交通大学,上海200240

出　　处：《功能材料与器件学报》2009年第4期332-338,共7页Journal of Functional Materials and Devices

基　　金：国家863计划(2006AA04Z308);国家自然科学基金(50775148)

摘　　要：采用直径为10～20 nm的碳纳米管作为增强相材料,采用间歇超声复合空气搅拌,通过复合电沉积技术,制备了碳管均匀分散,表面平整连续的镍基碳纳米管复合薄膜。通过扫描电子显微镜(SEM),对镀层的表面形貌进行了观察,并用表面轮廓仪,对镀层的粗糙度进行了测量。通过显微硬度计和纳米硬度计对镀层的硬度分别进行了测量,采用一种新型的微拉伸器件对复合薄膜的拉伸性能进行了测量。通过实验发现,采用间歇超声复合空气搅拌方式在镍镀层中复合碳纳米管,可以明显的提高镀层的硬度,并且当镀层中碳纳米管体积百分比在4%左右时,镀层硬度最大。同时镀层的抗拉强度也有所提高,通过用SEM对镀层断裂处观测,验证了碳纳米管的增强效应。Multi - walled carbon nanotubes （MWNTs） , having a diameter around 10 - 20 nm, were used as reinforcement for electrodeposition of Ni. Compact and smooth Ni - carbon nanotubes composite coatings were prepared by electrodeposition in Ni plating bath containing homogeneously dispersed carbon nanotubes with the aid of interval ultrasonic agitation and air agitation. The morphologies of the composite films were observed on a scanning electron microscopy （SEM） , and roughness was tested on stylus profiler. The hardness of the films was examined on the microhardnss instrument and nanohardness instrument respectively. Tensile strength of the thin composite film was measured on a new micro - tensile device. It was found that the introduction of MWNTs in the electrodeposition of Ni with the aid of interval ultrasonic agitation and air agitation would greatly increase the hardness of the composite films, which reached its climax when the content of MWNTs was around 4%. The tensile strength of the composite film is also slightly improved, The SEM image of the fracture prove this reinforcement effect.

关 键 词：材料学 镍基复合材料 复合电沉积 碳纳米管 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ153.12[化学工程—电化学工业]