【摘要】 采用脉冲摩擦喷射电沉积和直流喷射电沉积分别在石墨基底上制备了纳米晶镍镀层,利用扫描电镜和X射线衍射分析了脉冲占空比和脉冲频率对镍镀层的表面形貌、晶粒的择优取向及平均晶粒尺寸的影响。结果表明脉冲摩擦喷射电沉积较直流喷射电沉积的沉积效果有较大提高,在喷嘴流量为200L/h,平均电流密度为80A/dm2,阴极转速为6r/min的条件下,脉冲占空比为50%,脉冲频率为2000Hz时可以获得表面较为平整光亮、组织致密的Ni沉积层。更多还原

【Abstract】 Nickel deposition layers were prepared by pulsed friction aided jet electro-deposition and DC jet electro-deposition on the substrate of graphite respectively,their surface micrograph,preferred orientation and average grain size were studied by SEM and XRD.The result indicate that comparing to DC jet electro-deposition,pulsed friction aided jet electro-deposition show better deposition effect. Under the condition that the nozzle flow rate is 200L/h,the average current density is 80A/dm2,the cathode rotating speed is 6r/min,when the pulse duty ratio is 50%,the pulse frequency is 2000Hz, smoother,brighter and more compact nickel-deposited layer can be obtained.更多还原