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双重电化学处理改善Ti6Al4V合金性能

Dual Electrochemical Treatments to Improve Properties of Ti6Al4V Alloy.

作者信息

Rossi Stefano, Volgare Luciana, Perrin-Pellegrino Carine, Chassigneux Carine, Dousset Erick, Eyraud Marielle

机构信息

Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.

Matériaux Divisés, Revêtements, Électrocéramiques (MADIREL), Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université, UMR 7246, 13013 Marseille, France.

出版信息

Materials (Basel). 2020 May 29;13(11):2479. doi: 10.3390/ma13112479.

DOI:10.3390/ma13112479
PMID:32485973
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7321181/
Abstract

Surface treatments are considered as a good alternative to increase biocompatibility and the lifetime of Ti-based alloys used for implants in the human body. The present research reports the comparison of bare and modified Ti6Al4V substrates on hydrophilicity and corrosion resistance properties in body fluid environment at 37 °C. Several surface treatments were conducted separately to obtain either a porous oxide layer using nanostructuration (N) in ethylene glycol containing fluoride solution, or bulk oxide thin films through heat treatment at 450 °C for 3 h (HT), or electrochemical oxidation at 1 V for 3 h (EO), as well as combined treatments (N-HT and N-EO). In-situ X-ray diffraction and ex-situ transmission electron microscopy have shown that heat treatment gave first rise to the formation of a 30 nm thick amorphous layer which crystallized in rutile around 620 °C. Electrochemical oxidations gave rise to a 10 nm thick amorphous film on the top of the surface (EO) or below the amorphous nanotube layer (N-EO). Dual treated samples presented similar results with a more stable behavior for N-EO. Finally, for both corrosion and hydrophilicity points of view, the new combined treatment to get a total amorphous N-EO sample seems to be the best and even better than the partially crystallized N-HT sample.

摘要

表面处理被认为是提高用于人体植入物的钛基合金生物相容性和使用寿命的一种良好替代方法。本研究报告了在37°C的体液环境中，裸露的和改性的Ti6Al4V基体在亲水性和耐腐蚀性方面的比较。分别进行了几种表面处理，以在含氟的乙二醇溶液中通过纳米结构化（N）获得多孔氧化层，或在450°C下热处理3小时（HT）获得块状氧化薄膜，或在1V下进行3小时的电化学氧化（EO），以及联合处理（N-HT和N-EO）。原位X射线衍射和非原位透射电子显微镜表明，热处理首先形成了一个30nm厚的非晶层，该非晶层在620°C左右结晶为金红石。电化学氧化在表面顶部（EO）或非晶纳米管层下方（N-EO）形成了一个10nm厚的非晶膜。双重处理的样品呈现出相似的结果，N-EO的行为更稳定。最后，从腐蚀和亲水性的角度来看，获得完全非晶态N-EO样品的新联合处理似乎是最好的，甚至比部分结晶的N-HT样品还要好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/631536f08dfb/materials-13-02479-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/631536f08dfb/materials-13-02479-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/b8507ed7a9b0/materials-13-02479-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/c238d6bf0f1d/materials-13-02479-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/43505288a2fd/materials-13-02479-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/c42904adefca/materials-13-02479-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/640b0c3122b8/materials-13-02479-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/0aa287820d59/materials-13-02479-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/ec96ea4c284e/materials-13-02479-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/b52812972aca/materials-13-02479-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2c/7321181/631536f08dfb/materials-13-02479-g012.jpg

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