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多层铜镍系统中成分梯度的补充数据，这是一种商业磁数据存储系统的模型。旋转环盘电极技术能够实时测量合金的沉积速率和纯度；然而，这些测量是径向集成的。微探针测量表明，组成是给定层的径向位置和沉积厚度的函数。实验结果用于验证电沉积模型。电沉积作为一种灵活而廉价的制备纳米结构成分调制合金的方法显示出巨大的前景。这对于生产高质量的磁记录磁头和相关的数据存储应用是当前特别感兴趣的。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，因此不能基于第一性原理对电沉积工艺进行优化。本研究旨在使这种优化较少经验性。

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.