等离子喷涂制备HA/MO纳米管复合涂层及性能分析

目的提高生物医用钛合金涂层的结合力与生物活性。方法采用阳极氧化法在Ti-10Mo-28Nb-3Zr-6Ta合金表面先制备纳米氧化管,接着通过等离子喷涂法在纳米氧化层表面喷涂HA生物涂层,制备HA/MO纳米管复合涂层,对合金进行表面改性。在等离子喷涂法制备复合涂层时,通过改变喷涂电压和喷涂距离,对涂层的显微结构和物相组成进行探究,获得最佳制备工艺参数,同时对最佳工艺参数制备的复合涂层,通过电化学工作站实验、自动划痕仪测试、仿生矿化法试验和MTT法(四唑盐比色法)试验,分别评价复合涂层的耐腐蚀性能、附着力、生物活性和细胞毒性。结果在钛合金用阳极氧化法预处理的前提下,通过等离子喷涂制备HA/MO纳米管复合涂层,当喷涂电压为40V、喷涂距离为100mm时,制备出的HA/MO纳米管复合涂层涂覆均匀,涂层厚度在50μm左右,耐蚀性得到提高,结合力最佳,为14.8 N。HA/MO纳米管复合涂层具有良好的生物活性,通过培养细胞进行毒性实验,HA/纳米管复合涂层试样的毒性分级为0级,对细胞无影响,且从细胞增殖速率分析,试样表现出优异的细胞活性,对细胞的增长速率促进效果最好。结论 HA/MO纳米管复合涂层可以有效提高耐蚀性和结合强度,同时提高材料的生物活性。

Preparation and Performance Analysis of HA/MO Nanotube Composite Coating by Plasma Spraying

To improve the binding force and biological activity of biomedical titanium alloy coatings.In this paper,nanometer oxide tube was prepared on the surface of the Ti-10Mo-28Nb-3Zr-6Ta alloy by anodizing method,and then HA biological coating was sprayed on the surface of the nano-oxide layer by plasma spraying method.the composite coating of HA/MO nanotubes was prepared to modify the surface of the alloy.During the preparation of the composite coating by plasma spraying,the microstructure and phase composition of the coating were investigated by changing the spraying voltage and spraying distance,and the optimum preparation process parameters were obtained.The corrosion resistance,adhesion,bioactivity and cytotoxicity of the composite coating were evaluated by electrochemical workstation test,automatic scratch tester test,biomimetic mineralization test and MTT method(tetrazolium salt colorimetric method).On the premise of anodizing pretreatment of titanium alloy,HA/MO nanotube composite coating was prepared by plasma spraying.When the spraying voltage was 40 V,the spraying distance was 100 mm,the coating thickness was about 50μm,and the corrosion resistance of the coating was improved.The binding force of the coating is increased,and the binding force is 14.8 N;HA/MO nanotube composite coating has good biological activity,through the culture of cells for toxicity experiments,HA/MO nanotube composite coating sample toxicity grade 0,no effect on cells,and from the cell proliferation rate analysis,the sample showed excellent cell activity,the best effect on cell growth rate promotion.HA/MO nanotube composite coating can effectively improve the corrosion resistance and bonding strength of the coating,while improving the biological activity of the material.