Femtosecond laser-induced periodic surface structures on titanium nitride coatings for tribological applications
Femtosecond laser-induced periodic surface structures on titanium nitride coatings for tribological applications
复制标题
DOI：
10.1016/j.apsusc.2016.10.132
复制
发表时间：
2017-10-01
影响因子：
6.7
通讯作者：
Krueger, J.
中科院分区：
文献类型：
--
作者：
Bonse, J.;Kirner, S. V.;Krueger, J.
将氮化钛（TiN）涂覆在纯钛（Ti）、钛合金（Ti6AI4V）和钢（100Cr6）等不同的衬底材料上，生成2.5 μ m厚的TiN层。利用飞秒激光脉冲（30 fs, 790 nm， 1 kHz脉冲重复率），生成了亚波长周期在470 nm ~ 600 nm之间的大表面积（5 rnm × 5 mm）的激光诱导周期性表面结构（LIPSS），并通过光学显微镜（OM）、白光干涉显微镜（WLIM）和扫描电子显微镜（SEM）对其进行了表征。在摩擦学测试中，纳米结构表面的摩擦系数（COF）在往复滑动条件下（1 Hz， 1.0N的正常载荷），在1000次循环中，使用两种不同的润滑剂，即石蜡油和机油，对直径为10毫米的硬化100Cr6钢球进行了测定。结果表明，衬底材料、激光通量和润滑剂是影响摩擦磨损性能的关键因素。然而，与非结构化TiN表面相比，LIPSS不能显著降低TiN层的摩擦和磨损。最后，利用能量色散x射线能谱（EDX）对纳米结构表面上的磨损轨迹进行了形貌（OM、SEM）、深度（WLIM）和化学成分的研究，并与非结构TiN表面进行了比较。(C) 2016 Elsevier B.V.版权所有
Titanium nitride (TiN) was coated on different substrate materials, namely pure titanium (Ti), titanium alloy (Ti6AI4V) and steel (100Cr6), generating 2.5 mu m thick TiN layers. Using femtosecond laser pulses (30 fs, 790 nm, 1 kHz pulse repetition rate), large surface areas (5 rnm x 5 mm) of laser-induced periodic surface structures (LIPSS) with sub-wavelength periods ranging between 470 nm and 600 nm were generated and characterized by optical microscopy (OM), white light interference microscopy (WLIM) and scanning electron microscopy (SEM). In tribological tests, coefficients of friction (COF) of the nanostructured surfaces were determined under reciprocating sliding conditions (1 Hz, 1.0N normal load) against a 10-mm diameter ball of hardened 100Cr6 steel during 1000 cycles using two different lubricants, namely paraffin oil and engine oil. It turned out that the substrate material, the laser fluence and the lubricant are crucial for the tribological performance. However, friction and wear could not be significantly reduced by LIPSS on TiN layers in comparison to unstructured TiN surfaces. Finally, the resulting wear tracks on the nanostructured surfaces were investigated with respect to their morphology (OM, SEM), depth (WLIM) and chemical composition by energy dispersive X-ray spectroscopy (EDX) and, on one hand, compared with each other, on the other hand, with non-structured TiN surfaces. (C) 2016 Elsevier B.V. All rights reserved.