钛合金复合阳极氧化膜层生长机制研究

项目名称： 钛合金复合阳极氧化膜层生长机制研究

项目编号： No.51271012

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 李松梅

作者单位： 北京航空航天大学

项目金额： 80万元

中文摘要： 目前钛合金阳极氧化存在含F、易造成氢脆、氧化膜性能不够完善等缺点。为解决以上问题，本项目以钛合金为研究对象，采用不含F的酒石酸盐中性阳极氧化槽液，并添加PTFE、SiC等纳米颗粒以提高氧化膜性能，采用脉冲阳极氧化电源，进行复合阳极氧化研究。探讨不同影响因素（纳米颗粒粒径、纳米颗粒浓度、纳米颗粒种类、电源参数、氧化时间等）下钛合金复合阳极氧化膜的结构、组织、成分以及性能，分析不同阳极氧化阶段钛合金氧化膜表面微裂纹的产生、扩展以及修复过程，探讨复合阳极氧化不同阶段过程中的氧化膜的演变过程，提出合理的生长机制，获得纳米颗粒在复合阳极氧化过程中的作用机理以及纳米颗粒与氧化膜中其它成分的结合键能模型，为复合阳极氧化的研究、应用奠定良好的科学基础。

中文关键词： 钛合金；复合阳极氧化；纳米颗粒；作用机制；生长机制

英文摘要： The processes of titanium anodization have some problems, such as hydrogen brittleness、involving fluorine and etc.,recently. Anodizied composite films are grown on titanium alloys in the solution of tartrate with adding PTFE or SiC nano particales by using pulse galvanostatic power supply. Different factors (particle size of nanoparticles, the concentration of nanoparticles, the types of nanoparticles, the parameters of pulse power supply and oxidation time, etc.) are discussed. Further, the structure, conpostion, organization and performace of anodizied composite films on titanium alloys are studied. The appearance, expansion and repair process of micro-cracks on the surface of anodizied composite films are analysised. In order to acquire a reasonable growth mechanism, the evolution of the anodizied composite films on titanium alloys is studied at different stages of the process. The affection of nanoparticles in the process of anodization and the combination of the bond energy model of nanoparticles with other components of the oxide films is also discussed. A good scientific basis for the study of the composite anodic oxidation is established.

英文关键词： titanium alloy；composite anodizing；nanoparticles；effect mechanism；growth mechanism