Electrodeposition of Metal Matrix Composite Films

摘要提案题目：电沉积金属基复合材料薄膜提案号：cts - 9971558首席研究员：Jan talbotinstitute: University of California San diego电共沉积是金属电解沉积过程中粒子的结合过程。该工艺生产的复合薄膜由含有分散的小颗粒的金属基体组成。具有微米尺寸颗粒的电共沉积膜在腐蚀和磨损保护，润滑和电催化等领域得到了重要应用。尽管目前使用这种技术制造复合薄膜，但尚未确定在沉积薄膜中实现均匀分散颗粒的特定体积分数所需的条件。了解沉积速率如何取决于加工条件，对于控制沉积成分和性质至关重要。该研究的目的是通过研究工艺变量对沉积层中颗粒结合的影响，提高定制均匀和梯度颗粒分布的电沉积金属基复合材料薄膜的能力。使用旋转圆柱形电极系统地研究了氧化铝颗粒在铜基体中的电共沉积。这种电极结构允许研究流体动力学对颗粒掺入的影响。在电沉积研究结果的基础上，将制备出颗粒浓度梯度的梯度复合膜的新材料结构。现有的共沉积模型将应用于实验数据，并将开发改进的电共沉积模型或相关模型。

AbstractProposal Title: Electrodeposition of Metal Matrix Composite Films Proposal Number: CTS-9971508Principal Investigator: Jan TalbotInstitution: University of California San DiegoElectrocodeposition is the process of particle incorporation during the electrolytic deposition of metal. This process produces composite films consisting of a metallic matrix containing a dispersion of small particles. Electrocodeposited films with micron size particles have found important applications in areas such as corrosion and wear protection, lubrication, and electrocatalysis. Although composite films are currently manufactured using this technique, the ability to define the conditions necessary to achieve a specified volume fraction of uniformly dispersed particles in the deposited film has not been established. An understanding of how the deposition rate depends on the processing conditions is essential to controlling the deposit composition and properties. The objective of the research is to improve the ability to tailor electrodeposited metal matrix composite films of both uniform and gradient particle distributions by investigating the effects of process variables on particle incorporation within the deposit. The electrocodeposition of alumina particles in a copper matrix will be systematically studied using a rotating cylinder electrode. This electrode configuration allows the effects of hydrodynamics on particle incorporation to be investigated. New materials structures of gradient composite films with a gradient in the particle concentration will be made based upon the results of the electrocodeposition study. Existing models of codeposition will be applied to the experimental data, and an improved model or correlation of electrocodeposition will be developed.