Engineering of multilayered coating on additively manufactured Ti-6Al-4V porous implants to promote tribological and fatigue performances

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-09-24 DOI:10.1016/j.surfcoat.2024.131400

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引用次数: 0

Abstract

Despite the numerous advantages of additively manufactured Ti-6Al-4V porous implants surface modified by plasma electrolyte oxidation (PEO) coatings in biomedical applications, several challenges still persist regarding their tribological and fatigue performances. To address these challenges, this study aims to engineer an innovative multilayered coating based on physical vapor deposited (PVD) Nb/NbN coatings on PEO-treaded Ti-6Al-4V porous implants. Three configurations of Nb/NbN coatings, including one, two, and three PVD layers were deposited on PEO-treated Ti-6Al-4V implants to simultaneously assess the effects of both increased coating thickness and configuration on the surface topography and mechanical performances of Ti-6Al-4V implants. Results showed that increasing the thickness and number of coatings changed the surface morphology and reduced the surface roughness. The PVD/PEO treatment demonstrated enhanced wear resistance of Ti-6Al-4V samples compared to the PEO treatment, depending on the coating conditions. Noticeably, the samples with 2 Nb/NbN layers exhibited the highest wear resistance and decreased the wear rate by 90 % compared to the Ti-6Al-4V samples. Although PEO treatment resulted in a decrease in fatigue life, the deposition of Nb/NbN coatings, especially those with 2 and 3 layers, markedly improved fatigue resistance compared to the PEO-treated samples. These modified samples attained approximately 81 % and 84 % of the fatigue life of the not-treated Ti-6Al-4V samples, respectively. Overall, the deposition of multilayered PVD Nb/NbN coatings on PEO-treated Ti-6Al-4V implants demonstrated an effective improvement in wear resistance while maintaining acceptable fatigue life under cyclic loading, making it promising for biomedical implants.

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在快速成型的 Ti-6Al-4V 多孔植入物上设计多层涂层，以提高摩擦学和疲劳性能

通过等离子电解质氧化（PEO）涂层进行表面改性的增材制造 Ti-6Al-4V 多孔植入体在生物医学应用中具有诸多优势，但在其摩擦学和疲劳性能方面仍存在一些挑战。为了应对这些挑战，本研究旨在基于物理气相沉积（PVD）Nb/NbN 涂层在 PEO 涂层 Ti-6Al-4V 多孔植入体上设计一种创新的多层涂层。在经过 PEO 处理的 Ti-6Al-4V 植入体上沉积了三种配置的 Nb/NbN 涂层，包括一层、两层和三层 PVD 涂层，以同时评估增加涂层厚度和配置对 Ti-6Al-4V 植入体表面形貌和机械性能的影响。结果表明，涂层厚度和数量的增加改变了表面形貌，降低了表面粗糙度。与 PEO 处理相比，PVD/PEO 处理可提高 Ti-6Al-4V 样品的耐磨性，这取决于涂层条件。值得注意的是，与 Ti-6Al-4V 样品相比，具有 2 层 Nb/NbN 涂层的样品耐磨性最高，磨损率降低了 90%。虽然 PEO 处理会导致疲劳寿命下降，但与 PEO 处理过的样品相比，Nb/NbN 涂层的沉积，尤其是那些有 2 层和 3 层的涂层，明显提高了抗疲劳性。这些改性样品的疲劳寿命分别达到了未经处理的 Ti-6Al-4V 样品的约 81% 和 84%。总之，在经 PEO 处理的 Ti-6Al-4V 植入体上沉积多层 PVD Nb/NbN 涂层可有效提高耐磨性，同时在循环载荷下保持可接受的疲劳寿命，因此很有希望用于生物医学植入体。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.