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在相对运动速度不同的条件下,采用新型的柔性摩擦辅助电沉积技术在不含任何添加剂的Watts镀液中制备镍镀层,用SEM、AFM、XRD、TEM、X射线应力衍射仪以及硬度计等手段分别对镀层的形貌、结构、残余应力和硬度进行了表征。结果表明:相对运动速度对镍镀层的组织结构具有重要影响。相对运动速度在4.8-14.4 m/min范围内,电沉积的镍镀层均为面心立方结构,并呈现强(311)晶面择优取向;随着相对运动速度的增加,镀层表面的针状镍逐渐变得均匀、细小和致密,拉应力先降低后增大,而硬度从406 HV增加到471 HV。当相对运动速度为12 m/min时,镍镀层的平均晶粒尺寸约为100 nm,具有较高的硬度460 HV和最低的拉应力约100 MPa。
Under the condition of different relative speed of movement, nickel coating was prepared in a Watts bath without any additives by a new type of flexible friction assisted electrodeposition technique. SEM, AFM, XRD, TEM, X-ray diffraction and durometer Means were respectively coating morphology, structure, residual stress and hardness were characterized. The results show that the relative velocity of movement has an important influence on the microstructure of Ni coating. The relative movement velocity is in the range of 4.8-14.4 m / min. The electrodeposited nickel coatings have a face-centered cubic structure with a preferential orientation of strong (311) crystal plane. With the increase of relative velocity, acicular nickel Gradually become uniform, small and dense, the tensile stress decreases first and then increases, while the hardness increases from 406 HV to 471 HV. When the relative velocity is 12 m / min, the average grain size of the nickel coating is about 100 nm, with a higher hardness of 460 HV and the lowest tensile stress of about 100 MPa.