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首页> 外文期刊>Bio-medical materials and engineering >Effect of calcium and phosphorus ion implantation on the corrosion resistance and biocompatibility of titanium.
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Effect of calcium and phosphorus ion implantation on the corrosion resistance and biocompatibility of titanium.

机译：钙和磷离子注入对钛的耐蚀性和生物相容性的影响。

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This paper is concerned with the corrosion resistance and biocompatibility of titanium after surface modification by the ion implantation of calcium or phosphorus or calcium + phosphorus. Calcium and phosphorus ions were implanted in a dose of 10(17) ions/cm(2). The ion beam energy was 25 keV. The microstructure of the implanted layers was examined by TEM. The chemical composition of the surface layers was determined by XPS and SIMS. The corrosion resistance was examined by electrochemical methods in a simulated body fluid (SBF) at a temperature of 37 degrees C. The biocompatibility was evaluated in vitro. As shown by TEM results, the surface layers formed during calcium, phosphorus and calcium + phosphorus implantation were amorphous. The results of the electrochemical examinations (Stern's method) indicate that the calcium, phosphorus and calcium + phosphorus implantation into the surface of titanium increases its corrosion resistance in stationary conditions after short- and long-term exposures in SBF. Potentiodynamic tests show that the calcium-implanted samples undergo pitting corrosion during anodic polarisation. The breakdown potentials measured are high (2.5 to 3 V). The good biocompatibility of all the investigated materials was confirmed under the specific conditions of the applied examination, although, in the case of calcium implanted titanium it was not as good as that of non-implanted titanium.
机译：本文涉及通过离子注入钙或磷或钙+磷对钛进行表面改性后的耐蚀性和生物相容性。钙和磷离子的植入剂量为10（17）离子/ cm（2）。离子束能量为25 keV。通过TEM检查注入层的微观结构。表面层的化学组成通过XPS和SIMS确定。在37℃的温度下，通过电化学方法在模拟体液（SBF）中检查耐腐蚀性。在体外评价生物相容性。如TEM结果所示，在钙，磷和钙+磷注入期间形成的表面层是非晶的。电化学检查的结果（斯特恩方法）表明，在SBF中短期和长期暴露后，在固定条件下向钛表面注入钙，磷和钙+磷会增加其耐腐蚀性。电位动力学测试表明，植入钙的样品在阳极极化过程中会发生点蚀。测得的击穿电位很高（2.5至3 V）。在所应用的检查的特定条件下，所有被调查材料均具有良好的生物相容性，尽管在钙植入钛的情况下，其生物相容性不如未植入钛。

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