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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >(Ti, O)/Ti and (Ti, O, N)/Ti composite coatings fabricated via PIIID for the medical application of NiTi shape memory alloy
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(Ti, O)/Ti and (Ti, O, N)/Ti composite coatings fabricated via PIIID for the medical application of NiTi shape memory alloy

机译：通过PIIID制备的（Ti，O）/ Ti和（Ti，O，N）/ Ti复合涂层，用于NiTi形状记忆合金的医学应用

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摘要

In this investigation, the plasma immersion ion implantation and deposition (PIIID) technique was used to fabricate (Ti, O)/Ti or (Ti, O, N)/Ti coatings on a NiTi shape memory alloy (SMA, 50.8 at.% Ni) to improve its corrosion, wear resistance, and bioactivity. After coating fabrication, the structure and properties of composite coatings were studied, and the coated and uncoated NiTi SMA samples were compared with each other. Scanning electron microscopic (SEM) examination of coating surfaces and cross-sections showed that (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings were dense and uniform, having thickness values of 1.16 ?± 0.08 μm and 0.95 ?± 0.06 μm, respectively. X-ray diffraction (XRD) results revealed that there were no diffraction peaks corresponding to TiO 2 or TiN for (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings, suggesting that after the PIIID treatment, TiO 2 and TiN were amorphous or nanosized in the coatings. Energy dispersive X-ray (EDX) analysis indicated that the interface between the coating and NiTi SMA substrate was gradual rather than sharp. In addition, EDX elemental mapping of coating cross-sections showed that Ni was depleted from the surface. Differential scanning calorimetry (DSC) curves revealed that the shape memory ability of NiTi SMA was not degraded by the PIIID treatment. The width of wear tracks on (Ti, O, N)/Ti coated NiTi SMA samples was reduced 6.5-fold, in comparison with that on uncoated samples. The corrosion potential (E corr) was improved from -466.20 ?± 37.82 mV for uncoated samples to 125.50 ?± 21.49 mV and -185.40 ?± 37.05 mV for (Ti, O)/Ti coated and (Ti, O, N)/Ti coated samples, respectively. Both types of coatings facilitated bone-like apatite formation on the surface of NiTi SMA in simulated body fluid (SBF), indicating their in vitro bioactivity.
机译：在这项研究中，使用等离子体浸没离子注入和沉积（PIIID）技术在NiTi形状记忆合金（SMA，50.8 at。％）上制造（Ti，O）/ Ti或（Ti，O，N）/ Ti涂层Ni）以改善其腐蚀，耐磨性和生物活性。涂层制造后，研究了复合涂层的结构和性能，并比较了涂层和未涂层​​的NiTi SMA样品。涂层表面和横截面的扫描电子显微镜（SEM）检查显示（Ti，O）/ Ti和（Ti，O，N）/ Ti复合涂层致密且均匀，厚度值为1.16？±0.08μm。分别为0.95±0.06μm。 X射线衍射（XRD）结果表明，（Ti，O）/ Ti和（Ti，O，N）/ Ti复合涂层没有对应于TiO 2或TiN的衍射峰，这表明在PIIID处理后，TiO 2和TiN在涂层中是无定形的或纳米级的。能量色散X射线（EDX）分析表明，涂层与NiTi SMA基材之间的界面是渐进而不是尖锐的。另外，涂层横截面的EDX元素图谱表明镍从表面耗尽。差示扫描量热法（DSC）曲线显示NiTi SMA的形状记忆能力并未因PIIID处理而降低。与未涂层的样品相比，（Ti，O，N）/ Ti涂层的NiTi SMA样品的磨损痕迹宽度减少了6.5倍。对于（Ti，O）/ Ti涂层和（Ti，O，N）/钛涂层样品。两种类型的涂层都有助于在模拟体液（SBF）中的NiTi SMA表面形成骨状磷灰石，表明它们具有体外生物活性。

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