Influences of pulse frequency on formation and properties of composite anodic oxide films on Ti-10V-2Fe-3Al alloy  

作　　者：Xu DAI Chen WEN Liang WU Lei LIU Yulong WU Xingxing DING Jiahao WU Wenjun CI Aitao TANG Fusheng PAN 

机构地区：[1]State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]Beijing Spacecrafts,China Academy of Space Technology,Beijing 100094,China [3]National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China

出　　处：《Chinese Journal of Aeronautics》2021年第11期228-242,共15页中国航空学报（英文版）

基　　金：co-supported by the National Natural Science Foundation of China(Nos.51971040 and 51971044);the Fundamental Research Funds for the Central Universities,China(2020CDJQY-A007);China Postdoctoral Science Foundation Funded Project(Nos.2017M620410 and 2018T110942);the Chongqing Postdoctoral Scientific Research Foundation(No.Xm2017010)。

摘　　要：A thick composite anodic oxide film was fabricated in an environmentally friendly malic acid electrolyte containing Poly Tetra Fluoro Ethylene(PTFE)nanoparticles on Ti-10V-2Fe-3Al alloys.The influence of pulse frequency on the morphology,microstructure and composition of composite anodic oxide films containing PTFE nanoparticles was investigated using Field Emission Scanning Electron Microscopy(FE-SEM)equipped with Energy Dispersive Spectroscopy(EDS),Atomic Force Microscopy(AFM)and Raman spectroscopy.The tribological properties in terms of the friction coefficient,wear loss and morphology of worn surfaces were measured by ball-ondisc tests.The electrochemical property was evaluated by potentiodynamic polarization.The results indicated that the titanium dioxide of composite anodic oxide films transformed from anatase to rutile with the change of pulse frequency,which could result from the electrochemical dynamic equilibrium.The combination of PTFE nanoparticles and malic acid electrolyte molecules can influence the energy fluctuation of electrochemical equilibrium and formation of composite anodic oxide films.Moreover,composite anodic oxide films fabricated under the condition of 1.0–2.0 Hz exhibited the best wear resistance and corrosion property.The schematic diagram of the film formation and PTFE nanoparticles spreading process under different frequencies was elucidated.

关 键 词：Composite anodic oxide film Poly Tetra Fluoro Ethylene(PTFE) Pulse frequency Titanium alloy Wear resistance 

分 类 号：TG174.4[金属学及工艺—金属表面处理]