Evaluation of the corrosion resistance of welded Ni-Ti wires for orthodontic use
Evaluation of the corrosion resistance of welded Ni-Ti wires for orthodontic use
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正畸用镍钛焊接丝的耐腐蚀性能评价
DOI：
10.1016/j.matpr.2019.02.006
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. A. C. Santana
中科院分区：
文献类型：
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作者：
N.C.M. Lia Fook;J. D. Costa;M. B. Sousa;J. Alves;C. D. Araújo;A. Campos;R. A. C. Santana
近几十年来，对Ni-Ti合金应用的研究和分析变得越来越具体，趋向于针对医疗和正畸设备以及机电微系统中的应用的微和纳米致动器的研究。因此，焊接工艺通过促进形状记忆合金致动器（SMA）与相似和不同致动器之间的结合而成为重要的同盟，这是增加可用材料（特别是生物材料）的有用应用的一种方式。在此背景下，本研究旨在分析在模拟人唾液的溶液中，Ni-Ti超弹性丝与热活性Ni-Ti丝通过自焊TIG微焊接获得的焊缝区域的耐腐蚀性。焊接线的热处理基于析因设计32。结果表明，在这项工作中使用的TIG焊接工艺产生的焊缝质量优良，表现出良好的耐腐蚀性的电解液，模拟人类唾液。用于研究热处理温度和时间对腐蚀结果的影响的实验设计在350 °C的温度和20分钟的时间范围内产生了很好的实验。电化学阻抗谱测试证实了这一结果。
In recent decades, researches and analysis for applying the Ni-Ti alloys have become increasingly more specific, tending to studies on micro and nano actuators targeting applications in medical and orthodontic devices and in electromechanical microsystems. Thus, the welding processes have become important allies by promoting the union between shape memory alloy actuators (SMA) with similar and dissimilar ones, which is one way of increasing the useful applications of available materials, especially biomaterials. In this context, this study aimed atanalyzing the corrosion resistance in the weld region obtained by autogenous TIG micro welding in Ni-Ti superelastic wires with thermo-active Ni-Ti wires in a solution that simulates human saliva. The welded wires heat treatment made based on a factorial design 32. The results revealed that the TIG welding process used in this work generated welds of excellent quality, showing a good resistance to corrosion in the electrolyte that simulates human saliva. The experimental design used to investigate the influence of temperature and time of heat treatment in corrosion results generated a great experiment with temperature of 350 °C and time in the range of 20 minutes. This result was confirmed by means of electrochemical impedance spectroscopy tests.