Pogrebnjak Alexander D, Webster Richard F, Tilley Richard D, Buranich Vladimir V, Ivashchenko Volodymyr I, Takeda Yoshihiko, Oyoshi Keiji, Sakenova Rimma, Piotrowska Katarzyna, Zukowski Pawel, Konarski Piotr, Kupchishin Anatoliy I, Budzynski Piotr
Sumy State University, 2, Rimsky Korsakov Street, 40007 Sumy, Ukraine.
Department of Biotechnology, Al-Farabi Kazakh National University, 050040 Almaty, Kazakhstan.
ACS Appl Mater Interfaces. 2021 Apr 14;13(14):16928-16938. doi: 10.1021/acsami.0c19451. Epub 2021 Apr 5.
A combination of coating deposition and consequent ion implantation could be beneficial in wear-resistant antifriction surface design and modification. In the present paper, the effects of low-energy 60 keV Si-ion implantation on multinanolayered CrN/ZrN grown on a stainless-steel substrate have been investigated. Complementary experimental (X-ray diffraction, high-resolution transmission electron microscopy, energy-dispersive spectroscopy, secondary ion mass spectrometry) and theoretical (first-principles) methods have been employed to investigate the structure, phase, and composition under a 1 × 10 cm irradiation dose. This study has revealed a moderate radiation-tolerance of the CrN/ZrN system, with a 26 nm bilayer period, where the effective ion range after irradiation was below 110 nm. Within the ion range, a decrease in composition homogeneity and structure crystallinity has been found. Si negative ions have been distributed asymmetrically with peak concentrations (10 and 6%) occupying the interfaces between the CrN and ZrN layers. First-principles investigations of the CrN/ZrN(001) heterostructures were carried out to validate the experimental results, which showed that the alignment of Si-rich interfaces closer to chromium layers is a consequence of the lower substitution energy of CrN rather than ZrN. Thus, strong Si-Cr bindings and difference in displacement energies of ZrN and CrN have been attributed as the main factors in Si-rich interface formation. The pin-on-ball tribological test results have exposed the enhancement in wear resistance and the friction coefficient of nanoscale coating via amorphous Si particles descending from interfacial areas and acting as a third-body.
涂层沉积与随后的离子注入相结合，可能有助于耐磨减摩表面的设计与改性。在本文中，研究了低能60 keV硅离子注入对在不锈钢基体上生长的多层CrN/ZrN的影响。采用了互补的实验方法（X射线衍射、高分辨率透射电子显微镜、能量色散光谱、二次离子质谱）和理论方法（第一性原理）来研究在1×10 cm辐照剂量下的结构、相和成分。本研究揭示了CrN/ZrN系统具有适度的辐射耐受性，双层周期为26 nm，辐照后的有效离子射程低于110 nm。在离子射程范围内，发现成分均匀性和结构结晶度有所下降。硅负离子呈不对称分布，峰值浓度（10%和6%）位于CrN和ZrN层之间的界面处。对CrN/ZrN(001)异质结构进行了第一性原理研究，以验证实验结果，结果表明富含硅的界面更靠近铬层是由于CrN而非ZrN的较低替代能。因此，强的Si-Cr键以及ZrN和CrN位移能的差异被认为是富含硅界面形成的主要因素。销盘摩擦学测试结果表明，纳米级涂层的耐磨性和摩擦系数通过从界面区域下降并作为第三体的非晶态硅颗粒而得到增强。
