石墨烯增强相对镍基复合镀层的强化作用及镀层制备  

Strengthening Effect and Preparation of Graphene-Reinforced Nickel-Based Composite Coating

作　　者：李兵[1] 陈喆 刘兰徽 邢镔 王秋林[1] LI Bing;CHEN Zhe;LIU Lan-hui;XING Bin;WANG Qiu-lin(Chengdu Aeronautic Polytechnic,Chengdu 610100,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;National Engineering Laboratory for Industrial Big-Data Application Technology,Chongqing Innovation Center of Industrial Big-Data Co.,Ltd.,Chongqing 400707,China)

机构地区：[1]成都航空职业技术学院,四川成都610100 [2]四川大学机械工程学院,四川成都610065 [3]重庆工业大数据创新中心有限公司工业大数据应用技术国家工程实验室,重庆400707

出　　处：《材料保护》2022年第4期40-45,共6页Materials Protection

基　　金：国家自然科学基金(51975390);成都航空职业技术学院校级自然科研重点项目(061756)资助。

摘　　要：为促进石墨烯基复合材料的制备和应用,利用电沉积的方法在碳素钢基体表面分别制备了石墨烯/镍复合镀层及纯镍镀层,利用扫描电镜(SEM)对镀层的形貌进行了观察分析,利用X射线衍射仪(XRD)对镀层的物相进行了分析,利用硬度测试仪对镀层进行了力学性能的评价。研究表明:在相同的制备条件下,对于石墨烯/镍复合镀层,石墨烯的引入使镍基晶粒细化,且由于石墨烯导电性能比镍好,在电沉积过程中,镍离子优先在石墨烯片上沉积形成包状凸起;而未添加石墨烯的纯镍镀层在沉积过程形成的是较为光滑平整的纯镍镀层,晶粒较大。XRD检测结果显示,整个电沉积过程无相变发生,石墨烯的引入使得沉积镍的晶粒细小,组织更致密。Raman检测结果显示沉积电流越小,沉积的石墨烯的2D峰与G峰的强度比值越大,分散效果越好。添加石墨烯的镍镀层硬度明显高于未添加石墨烯的镀层,最高硬度可达约530 HV_(4.9 N)。以上结果表明:利用电沉积技术将石墨烯作为第二相引入到金属基体中,是一种有效制备高性能石墨烯/金属复合材料的方法。For promoting the preparation and application of graphene-based composite materials,graphene/nickel composite coating and pure nickel coating were prepared on the surface of carbon steel substrate by electrodeposition method.The morphology of coating was observed and analyzed by scanning electron microscope(SEM),and the phase of the coating was analyzed by X-ray diffractometer(XRD).The mechanical properties of the coating were evaluated by hardness tester.Results showed that the introduction of graphene refined the nickel based crystal grains for graphene/nickel composite coating under the same preparation conditions.Due to the higher conductivity of the graphene than the Ni,Ni ions tended to be preferably deposited on the surface of the graphene sheets during electrodeposition process,leading to formation of bumps,while pure Ni coating without graphene exhibited a smooth and flat surface and a coarse grain structure.XRD results showed that no phase transformation occurred during electrodeposition process,and the addition of graphene resulted in the smaller crystal grains and the denser surface microstructure of deposited Ni.Raman spectrum results indicated that the smaller the deposition current,the greater the intensity ratio of 2D peak to G peak of deposited graphene,and the better the dispersion effect.Moreover,the hardness of the nickel coating with graphene was significantly higher than that of the coating without graphene,and the highest hardness could reach about 530 HV_(4.9 N).The above results showed that the electrodeposition method could be an effective way to introduce graphene in the metal substrate as the second phase to prepare high-performance graphene/metal composite materials.

关 键 词：石墨烯 复合镀层 电沉积 制备 硬度 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ153.2[化学工程—电化学工业]