Electrodeposition of Compositionally Modulated Alloys

摘要K.C.Liddell这是一项关于成分调制合金电沉积的研究。电化学和电子探针测量提供了关于多层铜-镍系统成分梯度的补充数据，多层铜-镍系统是商业磁数据存储系统的模型。旋转环盘电极技术能够实时原位测量合金的沉积速率和纯度；然而，这种测量是径向集成的。微探针测量表明，对于给定的层和沉积层厚度，成分是径向位置的函数。实验结果被用来验证电沉积模型。电沉积作为一种生产纳米结构成分调制合金的灵活而廉价的方法显示出巨大的前景。这对于生产高质量的磁记录头和相关的数据存储应用特别具有当前的兴趣。然而，工艺变量和产品性能之间的关系还没有被很好地理解，从而不能根据第一原理来优化电沉积工艺。这项研究旨在减少这种优化的经验性。

ABSTRACT K. C. Liddell This is a study of the electrodeposition of compositionally modulated alloys. Electrochemical and electron microprobe measurements provide complementary data on composition gradients in the multilayer copper-nickel system, a model for commercial magnetic data-storage systems. Rotating ring disk electrode techniques enable in-situ measurements of deposition rate and purity of an alloy in real time; however, such measurements are radially integrated. Microprobe measurements show of composition as a function of radial position for a given layer and deposit thickness. The experimental results are used to validate models of electrodeposition. Electrodeposition shows great promise as a flexible and inexpensive means of producing nanostructured compositionally modulated alloys. This is of especial current interest for production of high-quality magnetic recording heads and related data-storage applications. However, the relationships between process variables and product properties are not understood well enough to permit optimization of electrodeposition processes based on first principles. This study is intended to make such optimization less empirical.