钛基微纳多级结构钽涂层的构建及其表面特征研究

Construction and Properties of Titanium-based Micro/Nano Multi-level Tantalum Coating

采用等离子喷涂技术在医用纯钛基体表面构建出微纳米多级结构钽涂层。利用SEM、EDS和XRD分析微纳米多结构钽涂层的形貌、化学组成和物相组成,并根据ASTM C633-79评价涂层与基底的结合强度;采用牛血清蛋白(BSA)对比研究了钛基钽涂层与医用纯钛对照样表面的蛋白吸附行为。结果表明,在喷涂距离为110 mm、喷涂功率为30 k W时制备的钛基钽涂层具有典型微纳米多级结构特征,且与基体结合强度好、Ta相对含量高;蛋白吸附实验表明钛基钽涂层表面蛋白吸附量均高于医用纯钛对照样,具有良好的蛋白吸附能力。

Micro/nano multi-level structure tantalum coating was prepared on medical titanium substrate surface using a plasma spraying technique. The surface morphology, chemical composition and phase composition were analyzed by SEM, EDS and XRD, respectively, and the adhesion between the substrate and the coating was investigated by a tensile method. The surface adsorption amount of protein of the micro/nano multi-level tantalum coating and titanium substrate was compared by BSA. The result show that when the titanium-based tantalum coating is prepared with the spray distance of 110 mm and spray power of 30 k W, it possesses typical multi-level structural features and high Ta phase content, and combines with the substrate by good binding force; the protein adsorption test indicates that titanium-based tantalum coatings have good protein adsorption capacity, whose adsorption amount is higher than that of control samples.