Deformation and corrosion behaviors of Ti–O film deposited 316L stainless steel by plasma immersion ion implantation and deposition
Deformation and corrosion behaviors of Ti–O film deposited 316L stainless steel by plasma immersion ion implantation and deposition
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DOI：
10.1016/j.surfcoat.2012.11.012
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发表时间：
2013-01
影响因子：
5.4
通讯作者：
D. Xie;G. Wan;M. Maitz;Hong Sun;N. Huang
中科院分区：
文献类型：
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作者：
D. Xie;G. Wan;M. Maitz;Hong Sun;N. Huang
对于生物医疗设备上的表面改性膜，机械和化学耐久性与生物功能性同等重要。对于那些在负载和腐蚀性环境的组合条件下工作的人来说，情况尤其如此。在本工作中，我们研究了用于心血管支架的316L不锈钢涂层的变形和腐蚀行为。采用等离子体浸没离子注入与沉积(PIII&D)技术制备了Ti-O薄膜，实验条件符合心血管支架的塑性变形和腐蚀特性。拉伸和三点弯曲试验表明，经过较大塑性变形(延伸率为4%~16%)的Ti-O薄膜未发生剥离和剥离。电化学腐蚀试验表明，经变形处理的涂层316L不锈钢在模拟体液(SBF)中的腐蚀严重，但与未经变形处理的316L不锈钢相当，可用于支架的临床应用。由于具有良好的机械和化学稳定性以及生物医学功能，PIII&D钛氧薄膜有望在实际应用中作为心血管支架的表面修饰材料。
Mechanical and chemical durability is of equal importance as bio-functionality for surface-modifying films on biomedical devices. This is in particular true for those serving on combined conditions of loading and a corrosive ambient. In this work, we investigated the deformation and corrosion behaviors of Ti–O films coated onto 316L stainless steel aimed for cardiovascular stent applications. The Ti–O films were synthesized by plasma immersion ion implantation and deposition (PIII&D), and the investigation conditions were as required for cardiovascular stents concerning plastic deformation and corrosion. Tensile and three point bending tests showed that no peeling and delaminating occurred on the Ti–O film which had undergone relatively high plastic deformation (4% to16% elongation). Electrochemical corrosion tests showed that the deformed PIII&D Ti–O film coated 316L SS suffered more severe corrosion in simulated body fluid (SBF) than the non-deformed, but remained comparable to uncoated 316L SS, which is clinically acceptable for stents. Due to the good mechanical and chemical durability as well as biomedical functionalities, the PIII&D Ti–O films appear promising as surface-modification of cardiovascular stents in real applications.