Preparation and Electrochemical Behavior of Ca-P Containing Porous Titania Coating on TiNbZrFe Alloy by Micro-arc Oxidation
Ca-P containing porous titania coating was prepared on biomedical β-type TiNbZrFe alloy by micro-arc oxidation (MAO) in order to further improve the surface bioactivity and corrosion resistance of the alloy in simulated biological conditions. The phase structure,composition and morphology of the coating were analyzed and the electrochemical behaviors in NaCl solution were investigated. The results indicate that the diameter of the pores of the coating is between 1μm and 8μm. The average size of pores and Ca/P ratio of the coating increase with the voltage from 250V to 400V. The Ca/P ratio is 1.61,similar to that of human bone (1.67),when the voltage is 400V. The porous coatings are mainly made up of anatase,rutile and amorphous Ca-P compounds. αCa3(PO4)2 appears in the coating when the voltage is higher than 350V. The corrosion resistance of the alloy coated with anodic oxidation (AO) before MAO is higher than that of the alloy only coated with MAO. AO used in the present study results in thin and dense layer between the metal substrate and the MAO coating, which can improve the corrosion resistance.
Biomedical titanium alloy porous coating micro-arc oxidation electrochemical impedance spectroscopy
Lei Jin Wenfang Cui Xiu Song Lian Zhou Xianghong Liu
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education ),Northeastern Univers Northwest Institute of Nonferrous Metals Research,Xian 710016 China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
2146-2149
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）