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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.4; Jul 7-11, 2003; Leganes, Madrid, Spain >The improvement of biocompatibility of an equiatomic TiNi shape memory alloy by DC plasma-polymerized hexamethyldisilazane coatings
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The improvement of biocompatibility of an equiatomic TiNi shape memory alloy by DC plasma-polymerized hexamethyldisilazane coatings

机译：直流等离子体聚合的六甲基二硅氮烷涂层改善等原子TiNi形状记忆合金的生物相容性

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摘要

Due to its excellent biofunctionality from shape memory effect and psuedoelasticity of the TiNi alloy, TiNi alloy is a promising candidate in the medical applications. The biocompatibility of a metal implant is generally evaluated by the reaction (or damage) of the surrounding tissue. The intensity of damage caused by metallosis is proportional to the quantity of (toxic) metallic ions produced by corrosion. The corrosion resistance of TiNi shape memory alloy can be substantially improved by the DC plasma-polymerized hexamethyldisilazane coating. From the results of IR spectrum, water contact angle measurements and SEM as well as AFM observations, higher monomer pressure will not accelerate the deposition, but also lead to the formation of the coatings with a smoother surface and a more organic nature. The immersion test of specimen in 37℃ Ringer's solution indicates the coating will deteriorate from the analysis of electrochemical impedance spectroscopy (EIS). From the capacitance increment and the resistance decrement of coatings, the deterioration of coatings can be attributed to the water uptake during immersion.
机译：由于TiNi合金的形状记忆效应和粉弹性具有出色的生物功能性，因此TiNi合金在医学应用中是有希望的候选者。金属植入物的生物相容性通常通过周围组织的反应（或损伤）来评估。金属化造成的破坏强度与腐蚀产生的（有毒）金属离子量成正比。通过直流等离子体聚合的六甲基二硅氮烷涂层可以大大提高TiNi形状记忆合金的耐腐蚀性。从红外光谱，水接触角测量和SEM以及AFM观察的结果来看，较高的单体压力不会加速沉积，但还会导致形成具有更光滑表面和更有机性质的涂层。样品在37℃林格氏溶液中的浸没测试表明，通过电化学阻抗谱（EIS）分析，涂层将变质。从涂层的电容增加和电阻减小，涂层的劣化可归因于浸入期间的吸水率。

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