Laser nitriding of titanium surfaces for biomedical applications

SURFACE & COATINGS TECHNOLOGY

卷:385

Article

Zeng, Congyuan¹  Wen, Hao¹  Ettefagh, Ali Hemmasian¹  Zhang, Bin¹  Gao, Juan²  Haghshenas, Ali¹  Raush, Jonathan R.³  Guo, S. M.¹ 

[1] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA

[2] Louisiana State Univ, Dept Pharmacol, Hlth Sci Ctr New Orleans, New Orleans, LA 70112 USA

[3] Univ Louisiana Lafayette, Dept Mech Engn, Lafayette, LA 70503 USA

关键词: Laser surface nitriding;    Bio-compatibility;    Coating compositions;    Corrosion resistance;   

DOI  :  10.1016/j.surfcoat.2020.125397

来源: Elsevier

【 摘 要 】

In this paper, titanium nitrides were produced on commercially pure titanium samples by laser nitriding processes, with the goal of improving bio-compatibility and corrosion resistance. To identify the critical set of laser nitriding processing parameters (a combination of both laser scanning parameters and the N-2 content processing gas), mouse MLO-Y4 cells were utilized for bio-compatibility evaluation, and simulated body fluid was used for electrochemical behavior examination to characterize corrosion performance. The modified surfaces were also characterized with scanning electron microscope, X-ray diffraction, and nano-indentation techniques to reveal the connections between the bio-compatibility/corrosion resistance performance and the nitrided layer composition, thickness, and surface roughness. For improved bio-compatibility and corrosion resistance performance, a dense and thick titanium-nitride dendritic layer is desirable, which can be formed in a pure N-2 environment, together with a high laser energy density.

【 授权许可】

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