SiC纳米颗粒对脉冲电沉积Ni-SiC复合镀层性能的影响  

Effect of SiC nanoparticles on properties of pulse electrodeposited Ni-SiC composite coatings

作　　者：国雪 王金东[1] 马春阳[1] 李健奇 张静 GUO Xue;WANG Jindong;MA Chunyang;LI Jianqi;ZHANG Jing(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;Daqing Petrochemical Engineering Testing,Technology Co.,Ltd,Daqing 163714,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]大庆石油化工工程检测技术有限公司,黑龙江大庆163714

出　　处：《兵器材料科学与工程》2018年第4期35-38,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51474072);黑龙江省科学基金(LC2018020)

摘　　要：采用脉冲电沉积方法制备Ni-SiC复合镀层,研究SiC纳米颗粒对Ni-SiC复合镀层的表面形貌、组织成分、显微硬度、耐磨性能及耐腐蚀性能的影响。结果表明,含有SiC纳米颗粒的复合镀层比未含SiC的表面结构更紧致,镍晶粒更细小,且镀层中SiC纳米颗粒的质量分数达到最大,为5.79%。Ni-SiC复合镀层表面与内部的显微硬度差异较小,相较于金属基体,复合镀层的显微硬度均有较大的提高。当磨损时间为10 min时,未含SiC纳米颗粒的复合镀层磨损量最多,为3.12 mg。当SiC粒子的质量浓度为3 g/L时,Ni-SiC复合镀层的平均显微硬度达到最大值,为600HV,磨损量达到最小值,为0.493 mg。Ni-SiC复合镀层在质量分数为3.5%的Na Cl溶液中的极化曲线形状相似,都没有钝化区域。当添加SiC粒子的质量浓度为3 g/L时,Ecorr向正移动达到最大值,为-0.441 V,Icorr达到最小值,为1.221×10-5A/cm2,表明Ni-SiC复合镀层的耐腐蚀性最好。Ni-SiC composite coatings were prepared by pulse electrodeposition. The effect of SiC nanoparticles on the surface morphology,composition,microhardness,wear resistance and corrosion resistance of Ni-SiC composite coatings was discussed.The results indicate that the composite coating containing SiC nanoparticles has more compact surface structure,smaller nickel grain size and the content of SiC nano-particles in the coating reaches the maximum of 5.79%（mass fraction）when compared with that without SiC nanoparticles. The difference of the microhardness between the surface and the interior of the Ni-SiC composite coating is small. Compared with the microhardness of the metal substance,the microhardness of the composite coating greatly increases. When the wear time is 10 min,the wear amount of composite coating without SiC nanoparticles reaches the maximum of 3.12 mg. When the concentration of SiC nanoparticles in the bath is 3 g/L,the average microhardness of Ni-SiC composite coating reaches the highest value of 600 HV,and the wear amount reaches the minimum of 0.493 mg. The polarization curves of Ni-SiC composite coatings in 3.5% Na Cl solution are similar in shape,and there is no passivation region. When the concentration of SiC nanoparticles in the bath is 3 g/L,Ecorrmoves forward to a maximum of-0.441 V and Icorrreaches a minimum of 1.221×10^-5 A/cm^2,which indicates that Ni-SiC composite coatings have the best corrosion resistance.

关 键 词：SiC纳米颗粒 脉冲电沉积 NI-SIC复合镀层 性能 

分 类 号：TQ153[化学工程—电化学工业]