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Combining multi-scale surface texturing and DLC coatings for improved tribological performance of 3D printed polymers
Surface & Coatings Technology ( IF 5.3 ) Pub Date : 2023-06-02 , DOI: 10.1016/j.surfcoat.2023.129682
Max Marian , Dario F. Zambrano , Benedict Rothammer , Valentin Waltenberger , Guido Boidi , Anna Krapf , Benoit Merle , Jürgen Stampfl , Andreas Rosenkranz , Carsten Gachot , Philipp G. Grützmacher

Polymer components fabricated by additive manufacturing typically show only moderate strength and low temperature stability, possibly leading to severe wear and short lifetimes especially under dry tribological sliding. To tackle these shortcomings, we investigated the combination of single- and multi-scale textures directly fabricated by digital light processing with amorphous diamond-like carbon (DLC) coatings. The topography of the samples and conformity of the coatings on the textures are assessed and their tribological behaviour under dry conditions is studied. We demonstrate that the surface textures have a detrimental tribological effect on the uncoated samples. This changes with the application of DLC coatings since friction substantially reduces and wear of the textures is not observed anymore. These trends are attributed to the protection of the underlying polymer substrate by the coatings and a reduced contact area. The best tribological performance is found for a coating with highest hardness and hardness-to-elasticity ratios. Moreover, multi-scale textures perform slightly better than single-scale textures due to a smaller real contact area. Summarizing, we verified that the high flexibility and low production costs of 3D printing combined with the excellent mechanical and tribological properties of DLC results in synergistic effects with an excellent performance under dry sliding conditions.



中文翻译:

结合多尺度表面纹理和 DLC 涂层以提高 3D 打印聚合物的摩擦学性能

通过增材制造制造的聚合物部件通常仅表现出中等强度和低温稳定性,可能导致严重磨损和短寿命,尤其是在干摩擦滑动下。为了解决这些缺点,我们研究了通过数字光处理与无定形类金刚石碳 (DLC) 涂层直接制造的单尺度和多尺度纹理的组合。评估了样品的形貌和涂层在纹理上的一致性,并研究了它们在干燥条件下的摩擦学行为。我们证明表面纹理对未涂层样品具有不利的摩擦学影响。这随着 DLC 涂层的应用而改变,因为摩擦大大减少并且不再观察到纹理磨损。这些趋势归因于涂层对底层聚合物基材的保护和接触面积的减少。具有最高硬度和硬度弹性比的涂层具有最佳摩擦学性能。此外,由于实际接触面积较小,多尺度纹理的性能略好于单尺度纹理。综上所述,我们验证了 3D 打印的高灵活性和低生产成本与 DLC 优异的机械和摩擦学性能相结合,在干滑动条件下产生了协同效应,并具有出色的性能。由于实际接触面积较小,多尺度纹理的性能略优于单尺度纹理。综上所述,我们验证了 3D 打印的高灵活性和低生产成本与 DLC 优异的机械和摩擦学性能相结合,产生了协同效应,在干滑动条件下具有出色的性能。由于实际接触面积较小,多尺度纹理的性能略优于单尺度纹理。综上所述,我们验证了 3D 打印的高灵活性和低生产成本与 DLC 优异的机械和摩擦学性能相结合,在干滑动条件下产生了协同效应,并具有出色的性能。

更新日期:2023-06-07
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