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钛合金长期植入体内依然存在磨损和腐蚀的问题,因此钛合金表面改性的目的就是提高其表面耐蚀性、耐磨性并赋予生物活性。本文在3种不同的电解液中,采用等离子电解氧化技术在TA1纯钛表面制备含有Ca、P的氧化钛多孔复合陶瓷层。研究了不同电解液中,改变工艺参数对纯钛表面陶瓷层平均厚度和生长机制的影响。采用扫描电镜和能谱分析了电流密度改变时,3种不同电解液中生成复合陶瓷膜的表截面形貌以及成分。结果表明,相同的电流密度,在电解液B中,陶瓷膜初始击穿电位最大,电解液C中陶瓷膜初始击穿电位值最小。正向电流为16 A/dm2时,在电解液A中陶瓷膜表面出现粉末状团聚物,在电解液B和C中,没有粉末状团聚物出现。无论是工艺参数还是电解液成分,对纯钛生物陶瓷膜的生长过程与组织结构都产生很大的影响,适当控制可制备所需的功能陶瓷膜。
Long-term implantation of titanium alloy remains the problem of wear and corrosion, so the purpose of titanium alloy surface modification is to improve its surface corrosion resistance, wear resistance and to give biological activity. In this paper, three kinds of different electrolyte, using plasma electrolytic oxidation technology in the preparation of TA1 titanium surface containing Ca, P porous ceramic composite oxide layer. The effects of process parameters on the average thickness and growth mechanism of pure titanium ceramic layers were investigated in different electrolytes. Scanning electron microscopy and energy dispersive spectroscopy were used to analyze the morphology and composition of the surface morphology of the composite ceramic membranes produced in three different electrolytes when the current density was changed. The results show that the initial breakdown voltage of the ceramic membrane is the highest in the electrolyte B and the initial breakdown voltage of the ceramic membrane in the electrolyte C is the lowest at the same current density. When the forward current was 16 A / dm2, a powdery aggregate appeared on the surface of the ceramic film in the electrolytic solution A, and no powdery aggregates appeared in the electrolytic solutions B and C. Whether it is the process parameters or electrolyte composition, the pure titanium bioceramic film growth process and the organizational structure have a great impact, proper control can be prepared for the desired functional ceramic membrane.