【摘要】 用纯Fe片做阳极,研究在纯Cu基体上采用高频(20-140kHz)脉冲电流获得的Fe-Co合金薄膜组织和性能与沉积参数的关系,分析了阳极在沉积过程中对镀层组织和性能的作用机理。电子探针(EPMA)照片表明,提高占空比,镀层粗糙度增加。扫描电镜(SEM)结果进一步表明,提高脉冲频率可以显著增加沉积速率,使镀层变厚,因此可采用高频脉冲来探索高速电镀技术。采用X射线衍射仪(XRD)分析了镀层结构,发现提高脉冲频率,fcc(111)与bcc(110)相对强度先减小后增大。振动样品磁强计(VSM)测试结果表明,140 kHz沉积的镀层矫顽力均低于20和80 kHz,即高频可以降低镀层矫顽力。虽然沉积的Fe65Co35合金薄膜饱和磁化强度高达2.12 T,但矫顽力较高。比较其它阳极沉积的FeCo合金薄膜,发现选用可溶性Co阳极比较适合。更多还原

【Abstract】 Taking a slice of Fe as an anode,the relationship of pulse electrodeposition parameters with the microstructure and magnetic property of Fe-Co alloy film deposited on pure Cu substrate by high-frequency(20-140 kHz) pulse currents was studied.Influence of solubility of Fe on composition and property of Fe-Co alloy deposits was also investigated.EPMA images showed that the surface roughness of Fe-Co films increases with duty cycle increasing.SEM micrographs revealed that with the increase of pulse frequency used in this experiment,the deposition rates are enhanced,which so increases the thickness of the Fe-Co films.Hence,high-frequency pulse electrodeposition technique was used for a new type of high-rate plating technique.XRD patterns showed that the intensity ratio between the fcc(111) and the bcc(110) at first decreases slightly and then increases abruptly as the pulse frequency increases.VSM results revealed that coercivity of Fe-Co film deposited at 140 kHz is lower compared with those deposited at 20 or 80 kHz,which indicates that the film with good soft magnetic property was electrodeposited at high frequency.Fe65Co35 film with saturation magnetizations of 2.12 T was prepared,but its coercivity was high.The performance of the Fe,Co and Ti anode was compared through coercivity value of deposits,and it was observed that the Co anode is superior to the others.更多还原