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提出一种力学-电沉积技术,在未添加任何光亮剂和晶粒细化添加剂的情况下制备出表面平整光亮的纳米晶镍沉积层.与传统电沉积技术的对照实验表明,硬质粒子在镍的沉积过程中不停磨擦和扰动阴极表面及附近溶液,能有效阻止氢气泡和杂质的吸附,避免凹坑、麻点和积瘤等表面缺陷产生.通过SEM,XRD和TEM观察和性能测试发现,硬质粒子的磨擦作用能改变沉积层的组织结构,进而影响其性能.与传统技术所制备的沉积层相比,用本文所述技术在相同条件下所制备镍沉积层的晶粒显著细化,尺寸大约30~80nm;各晶面的衍射强度和(200)面的择优取向度明显减小,(111)面和(220)面择优取向度增加;显微硬度显著提高;磁性能明显改变,饱和磁化强度减小,矫顽力增大.用力学-电沉积技术所制备镍沉积层的微观结构和性能受阴极转速和电流密度的影响.
A mechanics-electrodeposition technique was proposed to fabricate a nanocrystalline nickel deposit with smooth and bright surface without adding any brightener and grain refinement additives.Compared with the traditional electrodeposition technique, Nickel deposition process kept rubbing and disturbing the cathode surface and nearby solution, which can effectively prevent the adsorption of hydrogen bubbles and impurities, to avoid the surface defects such as pits, pits and plutonium production by SEM, XRD and TEM observation and performance testing It is found that the frictional effect of hard particles can change the structure of the deposited layer and thus affect its performance.Compared with the deposited layer prepared by the conventional technique, The diffraction intensity and the preferred orientation of (200) plane of each crystal face are obviously reduced, the preferred orientation degree of (111) plane and (220) plane is increased, the microhardness is significantly increased, and the magnetic properties Obviously changes, the saturation magnetization decreases and the coercive force increases.The microstructure and properties of nickel deposit prepared by mechano-electro-deposition technology are affected by cathode speed and current density.