电沉积触媒的制备及其合成金刚石的研究

用电沉积的方法以Ni70Mn25Co5为基材制备了合成金刚石的触媒，选择适当的合成条件，在国产六面顶压机上用此电沉积触媒合成出颜色和晶型都较好的金刚石，为纯铁片做为基材制备电沉积触媒，降低合成金刚石触媒生产成本奠定了一定基础。     

Cup-drawing formation of steel sheet with nickel coating by finite element method

The finite element method （FEM） simulation of deep-drawing of steel sheet with nickel coating based on the solid element and dynamic explicit method was reported. Penalty function method was used to treat the contact algorithm. The friction between the punch and coating sheet was based on a Coulomb formulation. The combination of coating and substrate was defined as tied with failure contact. The results of the simulation illustrate that the steel sheet and the nickel coating do not delaminate at the interface. The stress field of the nickel coating is more complicated thala that of the steel substrate. Furthermore, it is found that the punch-nose radius is the most unsubstantial part for the intensity of the entire deep-drawing part and the thinnest part, it is a dangerous zone for the break. At this zone, the thickness thinning of the steel sheet and the nickel coating are up to 4.8% and 6.7%, respectively. Meanwhile, it is found that the curve of the variable blankholder force （VBHF） designed can improve the formability of sheet.     

电沉积工艺参数对软磁铁箔磁性能的影响

测试了电沉积溶液温度和阴极电流密度变化时电沉积铁箔的磁滞回线。通过铁箔的金相组织观察，电沉积过程的电化学行为及铁箔的EDAX分析，探讨了电沉积工艺参数对铁箔磁性能影响的内在原因。结果表明：阴极电流密度增大时，电成型铁箔的矫顽力增大，最大磁导率降低；电沉积溶液温度提高时，铁箔的矫顽力降低，磁导率增大；在650℃经过真空退火后的铁箔矫顽力降低，最大磁导率提高。     

电沉积软磁铁箔连续化生产的关键技术研究

就电沉积方法制备软磁铁箔时要实现连续化生产的一些关键技术进行讨论。结果表明,经高精度抛光及钝化处理后的纯钛是理想的阴极材料;随电解液温度和阴极电流密度的提高,电成型铁箔的均匀程度均提高;电解液温度大于60℃时,添加10g·L-1的铁粉对溶液中的Fe2+氧化抑制程度在80%以上。     

液体润滑油微胶囊复合电沉积镍的研究

讨论了用水相分离法制备含有液体微胶囊的技术，并且将以润滑油为囊心的液体微胶囊加入到氨基磺酸镍镀液中进行复合共沉积，得到了含有液体润滑油微胶囊的复合镀镍层。通过对这种镀层的表面、断面形貌和成分分析，证实和确认了这种含有液体微胶囊的复合镀镍层。通过阳极极化曲线、3．5％NaCl溶液浸渍腐蚀试验、耐磨试验等结果表明含有润滑油为囊芯的微胶囊的复合镀镍层具有优良的耐腐蚀性和耐磨性。     

电镀Ni-P-Ti3C2Tx合金镀层的制备以及性能研究

目的提高Ni-P合金镀层的硬度及腐蚀防护性能。方法块体Ti3AlC2颗粒经过氢氟酸的刻蚀作用得到二维层状结构的Ti_3C_2T_x材料,并通过电沉积技术将其掺杂到Ni-P合金镀层中,从而制备出Ni-P-Ti_3C_2T_x复合合金镀层,研究复合合金镀层的成分、表面形貌、表面接触角和硬度,并结合动电位极化曲线以及尼奎斯特阻抗图,分析Ti_3C_2T_x颗粒掺杂对Ni-P合金镀层性能的影响。结果通过深入研究复合合金镀层的性能,发现随着Ti_3C_2T_x颗粒掺杂量的增加,Ni-P-Ti_3C_2T_x合金镀层的表面粗糙程度不断增加,这可能是由于导电的Ti_3C_2T_x颗粒使得合金镀层的树枝状结晶增加,而且合金镀层的表面接触角增大,对于提高合金镀层的腐蚀防护性能有很大的促进作用。由于Ti_3C_2T_x颗粒的掺杂,合金镀层的显微硬度得到了提高,这主要是依靠于弥散增韧的作用以及有限的晶界。Ni-P-Ti_3C_2T_x合金镀层的腐蚀防护性能随着Ti_3C_2T_x颗粒掺杂量的增加,出现了先增加后减小的趋势。结论 Ti_3C_2T_x颗粒的掺杂对提高Ni-P合金镀层的硬度以及腐蚀防护性能有一定的作用。     

应用电解镀层消除铜材复合界面及其有限元分析

控制电解沉积过程在纯铜的表面制得宏观上致密、光滑的铜镀层,以此镀层来消除叠轧金属层间的复合界面;对此镀层消除叠轧金属层间复合界面的机理进行初步的分析;并应用有限元软件对轧制过程进行计算机模拟分析,验证提出的机理;得出镀层材料塑性变形程度大,有利于消除金属层间复合界面;镀层不引起界面处塑性变形热效应的明显变化.     

电沉积镍涂层冲压过程的界面特性

采用有限元方法对电沉积镍涂层钢带的冲压成形过程进行了数值模拟,得到了电沉积镍涂层在界面上的应力场、应变场等冲压成形特性。计算结果表明：在冲压过程中,涂层与基体界面上的应力大小、拉压性质都是变化的,且正应力一般在-50～50MPa之间,剪应力一般在-40～30MPa之间;界面上涂层中的应变比基体中的应变大得多,但两者在变形过程中是比较匹配的。     

电沉积纳米晶镍的研究现状及展望

综述了电沉积法的特点和基本过程,电沉积纳米晶镍的制备工艺,电沉积纳米晶镍的织构和热稳定性,以及电沉积纳米晶镍的强度和硬度;展望了电沉积纳米晶镍的研究趋势.     

Electrodeposition and corrosion behaviour of a Ni–W–B amorphous alloy

Electrodeposition of Ni–W–B alloys from plating baths containing ammonia and citrate is reported. Optimum conditions for plating including current density, temperature, mechanical agitation and pH were studied. The corrosion resistance and amorphous character were also evaluated. The operational conditions for depositing the alloy with good corrosion resistance were: current density 35 mA cm⁻², bath temperature 40 °C, pH 9.0 and cathode rotation at 90 rpm. The alloy was deposited at 38% current efficiency, with an average composition of 73 wt% Ni, 27 wt% W and traces of boron and with E _corr −0.300 V and R _p 3.369×10⁴ Ω. The deposit obtained under these conditions had an amorphous character with the presence of some microcracks on its surface reaching down to the copper substrate. Electrochemical corrosion tests verified that the Ni–W–B alloy had better corrosion resistance than Co–W–B.