CAJ | 학술논문

采用电镀法制备镀Ti金刚石-Ni-Co复合镀层，研究镀液中Co2+含量对镀层形貌和性能的影响，并通过电化学阻抗谱研究Ni-Co复合电沉积过程。结果表明：当镀液中未添加Co2+时，所制备的镀Ti金刚石-Ni复合镀层内凹痕较多；镀液中添加Co2+后，镀Ti金刚石-Ni-Co复合镀层内凹痕消失，晶粒均匀。随着镀液中Co2+含量的增加，所制备的镀Ti金刚石复合镀层的显微硬度先增加后减少。当镀液中Co2+含量为6%(摩尔分数)时，在?0.85 V电位下Ni-Co共结晶电化学阻抗谱的电荷转移电阻最大，制备的镀Ti金刚石-Ni-Co镀层内金刚石含量最高。此外，当镀液中Co2+含量增加至8%时，镀Ti金刚石-Ni-Co复合镀层内金刚石粉体的沉积量最少。
채용전도법제비도Ti금강석-Ni-Co복합도층，연구도액중Co2+함량대도층형모화성능적영향，병통과전화학조항보연구Ni-Co복합전침적과정。결과표명：당도액중미첨가Co2+시，소제비적도Ti금강석-Ni복합도층내요흔교다；도액중첨가Co2+후，도Ti금강석-Ni-Co복합도층내요흔소실，정립균균。수착도액중Co2+함량적증가，소제비적도Ti금강석복합도층적현미경도선증가후감소。당도액중Co2+함량위6%(마이분수)시，재?0.85 V전위하Ni-Co공결정전화학조항보적전하전이전조최대，제비적도Ti금강석-Ni-Co도층내금강석함량최고。차외，당도액중Co2+함량증가지8%시，도Ti금강석-Ni-Co복합도층내금강석분체적침적량최소。
The Ti-coated-diamond-Ni-Co coating was prepared by electroplating process. Moreover, the effect of Co2+ content variation on the morphology and property of the Ti-coated diamond-Ni-Co coating was investigated. Meanwhile, the composite electrodeposition process was studied by electrochemical impedance spectroscopy (EIS). The results show that there are many dents on the Ti-coated diamond-Ni coating when Co2+ is not added in the plating bath. However, the dents disappear and the grain size becomes more uniform when Co2+ is added into the plating bath. Moreover, with the increase of Co2+ content in the plating bath, the microhardness of the composite coatings rises firstly and then declines. As Co2+ content in the plating bath is 6% (mole fraction), the charge transfer resistance of the Ni-Co codeposition evaluated from the EIS at ?0.85 V reaches the maximum value, and the content of diamond in the composite coating is the highest. In addition, as Co2+ content in the plating bath increases to 8%, the content of diamond in the composite coatings is the least.