电化学方法制备Fe_(50)Co_(50)合金及其微观结构

Fe_(50)Co_(50) alloy Prepared by Electrodeposition and Its Microstructure

采用电化学方法沉积方法制备Fe_(50)Co_(50)合金,研究了电解液组成、电流密度、温度、pH值和稳定剂等因素对电沉积铁钴合金组成的影响,并得到电沉积铁钴合金的最优工艺参数为:电流密度5A/dm^2,温度40℃,pH值2.5,电沉积时间60min;电解液的组成为:FeSO_4·7H_2O 60g/L,CoSO_4·7H_2O 30g/L,CoCl_2·6H_2O 10g/L,硼酸25g/L,柠檬酸三钠55g/L,抗坏血酸10g/L,糖精2g/L、十二烷基硫酸钠0.1g/L.通过扫描电镜、能谱仪和x射线衍射仪对铁钴合金的微观形貌、组成和微观结构进行了分析,合金表面平整,结构致密,无孔洞及裂纹,晶粒细小.合金为Fe-Co合金置换固溶体,面心立方晶体结构,呈现很强的(111)晶面择优取向.

Fe50Co50 alloy were prepared by the method of electrodeposition. The influences of electrolyte composition, current density, temperature, pH value and stabilizer on the composition of the Fe-Co alloy is discussed, and the electrolyte composition and process conditions of the electrodeposited Fe50Co50 alloy are obtained as follows： electrolyte eomposition： FeSO4.7H20 60 g/L, COSO4 o7H20 30 g/L, COC12.6H20 10 g/L, boric acid 25 g/L, citric acid sodium 55 g/L, ascorbic acid 10 g/L, saccharin 2 g/L, sodium lauryl sulfate 0.1 g/L. process parameters： Current density 5 A/dm2, temperature 40℃, pH value 2.5. The micro-morphology, microstructure and component of the Fe50Co50 alloy have been analyzed by scanning electron microscope, energy spectrometer and X-ray diffraction. The results show that the Fe50Co50 alloys has good surface topography; Fe50Co50 alloys exhibit different alloy phases as a function of their alloy composition.