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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Laser Nitriding on the Surface and Corrosion Properties of Ti-20Nb-13Zr Alloy in Artificial Saliva for Dental Applications
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Influence of Laser Nitriding on the Surface and Corrosion Properties of Ti-20Nb-13Zr Alloy in Artificial Saliva for Dental Applications

机译：激光氮化对人工唾液中Ti-20NB-13ZR合金表面和腐蚀性能的影响

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摘要

Ti alloys have been used for dentistry due to their lower density and improved compatibility. However, the resistance to corrosion and surface hardness of Ti alloys need to be improved to avoid the formation of debris, which affects the long-term biocompatibility. In the present work, the surface characteristics and corrosion protection in artificial saliva produced by laser nitriding of a new biomedical Ti-20Nb-13Zr at.% alloy have been investigated for dental applications. The laser nitrided and untreated alloy surfaces were examined using XRD, FE-SEM, x-ray photon spectroscopy, Vickers microhardness measurements, atomic force microscopy, scratch measurements, Raman spectroscopy, and surface energy measurements. The susceptibility of the laser nitrided TNZ alloy to corrosion in an artificial saliva medium was investigated by electrochemical corrosion tests, which were performed by utilizing open circuit potential monitoring, electrochemical frequency modulation, and electrochemical impedance spectroscopic methods. The findings revealed that a TiN layer formed on the alloy surface after nitriding. The surface hardness of the treated alloy was 2.4 times that of the as-received samples. Moreover, the results showed improved friction coefficient and hydrophilic surface characteristics. The corrosion analysis revealed that the compact and dense TiN layer produced during laser nitriding improved the corrosion resistance of the Ti-20Nb-13Zr sample in artificial saliva medium.
机译：由于它们的密度较低和改善的相容性，Ti合金已被用于牙科。然而，需要改善Ti合金的腐蚀和表面硬度的抵抗力以避免形成碎片，这影响了长期生物相容性。在本作工作中，通过激光氮化新的生物医学Ti-20nb-13zr产生的人工唾液中的表面特性和腐蚀保护。为牙科应用研究了％合金。使用XRD，Fe-SEM，X射线光子光谱，维氏微硬度测量，原子力显微镜，刮擦测量，拉曼光谱和表面能测量来检查激光氮化和未处理的合金表面。通过电化学腐蚀试验研究了激光氮化TNZ合金在人造唾液介质中腐蚀的敏感性，通过利用开路电位监测，电化学频率调制和电化学阻抗光谱方法进行。结果显示，在氮化后在合金表面上形成的锡层。处理过的合金的表面硬度为AS接收的样品的2.4倍。此外，结果显示出改善的摩擦系数和亲水性表面特性。腐蚀分析表明，激光氮化期间产生的紧凑且致密的锡层改善了人工唾液介质中Ti-20NB-13ZR样品的耐腐蚀性。

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