Abstract
In this work, the chromium aluminum nitride (CrAlN) coatings were prepared on TC11 titanium alloy by composite magnetic field cathodic arc ion plating with controllable pulse electromagnetic combined with permanent magnet. The effects of electromagnetic frequency on the morphology, microstructure, nano-hardness and elastic modulus of the coatings were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and nano-indenter. This paper has mainly studied the influence of CrAlN coatings which are prepared at various electromagnetic frequencies on the wear and erosion resistance through a series of wear and solid particle erosion experiments. It was found that the deposition rate of CrAlN coatings increases with the increase of electromagnetic frequency. And CrAlN coatings all preferentially grew along the (111) crystal plane. At 16.7 Hz, with the increase of pulsed electromagnetic frequency, the hardness is the highest (23.6 GPa) and the adhesion is the highest (41.5 N). In addition, the coating deposition exhibited the best wear and solid erosion resistance at 16.7 Hz and 33.3 Hz, the friction coefficient is about 0.35, and the erosion rate is about 0.2 µm/g at 30° and less than 1 µm/g at 90°, respectively. These results indicate that the CrAlN coating formed at an appropriate pulsed electromagnetic frequency can achieve excellent mechanical properties, wear and solid erosion resistance.
摘要
本文利用可控脉冲电磁与永磁体的复合磁场阴极电弧离子镀,在TC11钛合金上制备了氮化铬铝(CrAlN)涂层。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和纳米压痕仪研究了电磁频率对涂层形貌、微观结构、纳米硬度和弹性模量的影响。通过摩擦磨损和固体颗粒冲蚀试验,研究了在各种电磁频率下制备的CrAlN 涂层对耐磨性和抗冲蚀性的影响。发现随着电磁频率的增加,CrAlN 涂层的沉积速率加快。在16.7 Hz 时,涂层硬度最高为23.6 GPa,结合力最高为41.5 N。此外,在16.7 Hz 和33.3 Hz时沉积的涂层表现出良好的耐磨性和抗固体侵蚀性,摩擦因数约为0.35,在30°下的冲蚀速率约为0.2 µm/g,在90°下的冲蚀速率小于1 µm/g。这些结果表明,以适当的脉冲电磁频率制备的CrAlN涂层可以获得优异的力学性能,耐磨性和抗固体冲蚀性能。
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Foundation item: Projects(2017GDAS CX-0202, 2017GDAS CX-0111, 2018 GDAS CX-0402) supported by Guangdong Academy of Science’ Special Project of Science and Technology Development, China; Project(2014B070705007) supported by Guangdong Science and Technology Plan Project, China; Project(2016A030312015) supported by Scientific Research Fund of Guangdong Province, China; Project(2017A070701027) supported by Guangdong Science and Technology Program, China
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Wang, D., Lin, Ss., Liu, Ly. et al. Effect of pulsed electromagnetic frequency on the microstructure, wear and solid erosion resistance of CrAlN coatings deposited by arc ion plating. J. Cent. South Univ. 29, 3065–3076 (2022). https://doi.org/10.1007/s11771-022-5100-z
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DOI: https://doi.org/10.1007/s11771-022-5100-z