Insights into tribofilm formation on Ti-6V-4Al in a bioactive environment: Correlation between surface modification and micro-mechanical properties.
Insights into tribofilm formation on Ti-6V-4Al in a bioactive environment: Correlation between surface modification and micro-mechanical properties.
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深入了解生物活性环境中 Ti-6V-4Al 上摩擦膜的形成：表面改性与微机械性能之间的相关性。
DOI：
10.1016/j.actbio.2022.01.027
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发表时间：
2022
影响因子：
9.7
通讯作者：
Qi J
中科院分区：
文献类型：
--
作者：
Qi J
Ti-6Al-4V因其兼具强度、耐腐蚀性和生物相容性，长期以来一直被用作外科植入材料。然而，关于在摩擦腐蚀条件下表面如何与环境反应，仍然有很多不了解的地方。特别是，摩擦膜形成的条件及其对摩擦和磨损的作用尚不清楚。为了评估磨损痕迹上的动态表面微观结构变化的复杂性，高分辨率透射电子显微镜（TEM），扫描透射电子显微镜（STEM）和电子能量损失谱（EELS）已被用来表征摩擦膜的结构和化学组成。详细分析了摩擦膜的形成和结构以及金属表面变形行为，作为施加电势的函数和蛋白质在润滑剂中的作用。首次在测试溶液中发现了来自磨屑的石墨和洋葱状碳结构。在摩擦腐蚀过程中碳纳米结构的存在和摩擦膜的形成导致系统的改进的摩擦腐蚀行为，特别是减少磨损和摩擦。详细的，定量的，表面变形的分析进行，特别是，几何必要的位错（GND）的密度进行了定量使用旋进电子衍射（PET）。施加的电位，摩擦膜的形成和表面应变之间的明确的相关性established.Statement的意义的Ti-6Al-4V表面在生理环境中的摩擦腐蚀过程中的摩擦膜的形成和微观结构的修改是不完全理解。特别是，微观结构变化和电化学条件之间的相关性尚不清楚。本研究提出了一个详细的调查的结构和化学成分的摩擦膜在纳米级在模拟体液中的摩擦腐蚀测试过程中，并给出了详细的和定量的描述演变的表面结构。建立了外加电位、摩擦膜形成和表面应变之间的明确相关性。此外，特别注意的是从润滑溶液中捕获的磨屑颗粒，包括纳米碳洋葱结构。讨论了合金作为植入物的摩擦腐蚀的影响。
Ti-6Al-4V has been used as a surgical implant material for a long time because of its combination of strength, corrosion resistance and biocompatibility. However, there remains much that is not understood about how the surface reacts with the environment under tribocorrosion conditions. In particular, the conditions under which tribofilms form and their role on friction and wear are not clear. To evaluate the complicated nature of the dynamic surface microstructural changes on the wear track, high resolution transmission electron microscopy (TEM), scanning transmission electron microscope (STEM) and electron energy loss spectroscopy (EELS) have been used to characterise the structure and chemical composition of the tribofilm. Detailed analysis of the formation and structure of the tribofilm and the metal surface deformation behaviour were studied as a function of applied potential and the role of proteins in the lubricant. For the first time, graphitic and onion-like carbon structures from wear debris were found in the testing solution. The presence of carbon nanostructures in the tribocorrosion process and the formation of the tribofilm leads to an improved tribocorrosion behaviour of the system, in particular a reduction in wear and friction. A detailed, quantitative, analysis of surface deformation was undertaken, in particular, the geometrically necessary dislocation (GND) density was quantified using precession electron diffraction (PET). A clear correlation between applied potential, tribofilm formation and the surface strain was established.Statement of significanceThe formation of tribofilm and microstructure modification of the Ti-6Al-4V surface during tribocorrosion in a physiological environment is not fully understood. In particular, the correlation between microstructural changes and electrochemical conditions is not clear. This study presents a detailed investigation of the structure and chemical composition of tribofilms at the nanoscale during tribocorrosion tests in simulated body fluid and gives a detailed and quantitative description of the evolved surface structure. A clear correlation between applied potential, tribofilm formation and the surface strain was established. Moreover, particular attention is paid to the wear debris particles captured from the lubricating solution, including nanocarbon onion structures. The implications for tribocorrosion of the alloy in its performance as an implant are discussed.
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DOI：
10.1201/9780849377877.ch6
发表时间：
2000-12
期刊：
--
影响因子：
--
作者：
F. Kennedy
通讯作者：
F. Kennedy
CoCrMo 合金磨损转变与纳米晶表面层和蛋白质表面膜形成的相关性
影响因子：
5
作者：
R. Namus;P. Zeng;W. M. Rainforth
通讯作者：
W. M. Rainforth
影响因子：
5
作者：
R. Namus;W. M. Rainforth;Yi Huang;T. Langdon
通讯作者：
R. Namus;W. M. Rainforth;Yi Huang;T. Langdon
摩擦接触过程中动态表面微观结构的变化决定了髋关节假体（金属和陶瓷）的磨损行为。
影响因子：
3.4
作者：
W. M. Rainforth;P. Zeng;Le Ma;Akemi Nogiwa Valdez;T. Stewart
通讯作者：
T. Stewart
影响因子：
5
作者：
P. Zeng;A. Rana;R. Thompson;W. M. Rainforth
通讯作者：
P. Zeng;A. Rana;R. Thompson;W. M. Rainforth