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首页> 外文期刊>Surface & Coatings Technology >A comparative study of the effects of saccharin and beta-SiC nano-particles on the properties of Ni and Ni-Co alloy coatings
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A comparative study of the effects of saccharin and beta-SiC nano-particles on the properties of Ni and Ni-Co alloy coatings

机译：糖精和β-SiC纳米粒子对Ni和Ni-Co合金镀层性能的影响的比较研究

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摘要

The effects of saccharin and SiC nano-particles on the properties of Ni and Ni-Co based coatings electrodeposited in modified Watt's baths by sediment co-deposition (SCD) technique were studied. Surface morphologies of Ni and Ni-Co coatings were changed by using saccharin and SiC nano-particles. X-ray diffraction (XRD) results revealed that peak positions and the phase structure of the studied coatings did not change appreciably while the crystallite size and preferred orientation were significantly varied by using SiC nano-particles and particularly saccharin. Although the incorporation of SiC nano-particles had a slight influence on the microhardness of Ni based coatings, using saccharin enhanced their microhardness. However, there was no noticeable difference between the microhardness of Ni-45Co and Ni-45Co/saccharin coatings (containing 45 wt.% Co) while the microhardness of Ni-55Co/SiC nanocomposite coatings (containing 55 wt.% Co) was higher than Ni-45Co and Ni-45 Co/saccharin coatings. The potentiodynamic polarization measurements indicated that the corrosion resistance of Ni/saccharin and Ni-45Co/saccharin coatings was better than pure Ni and Ni-45Co coatings. Additionally, the corrosion properties of Ni/SiC and Ni-55Co/SiC nanocomposite coatings were markedly higher than other coatings. Ni-55Co/SiC nanocomposite coatings showed the highest microhardness and corrosion resistance compared to all studied coatings. The unique properties of Ni-55Co/SiC nanocomposite coatings were linked to their alloy matrix and the amount of SiC nano-particles (8.1 vol.%). (C) 2014 Elsevier B.V. All rights reserved.
机译：研究了糖精和SiC纳米颗粒对沉积物共沉积（SCD）技术在改性瓦特浴中电沉积的Ni和Ni-Co基涂层的性能的影响。通过使用糖精和SiC纳米粒子可以改变Ni和Ni-Co涂层的表面形貌。 X射线衍射（XRD）结果表明，所研究涂层的峰位和相结构没有明显变化，而使用SiC纳米颗粒，尤其是糖精显着改变了晶粒尺寸和优选取向。尽管掺入SiC纳米颗粒对Ni基涂层的显微硬度有轻微影响，但使用糖精增强了其显微硬度。但是，Ni-45Co和Ni-45Co /糖精涂层（含45 wt。％Co）的显微硬度之间没有明显差异，而Ni-55Co / SiC纳米复合涂层（含55 wt。％Co）的显微硬度较高。比Ni-45Co和Ni-45 Co /糖精涂层要高。电位动力学极化测量表明，Ni /糖精和Ni-45Co /糖精涂层的耐蚀性优于纯Ni和Ni-45Co涂层。此外，Ni / SiC和Ni-55Co / SiC纳米复合涂层的腐蚀性能明显高于其他涂层。与所有研究的涂层相比，Ni-55Co / SiC纳米复合涂层具有最高的显微硬度和耐腐蚀性。 Ni-55Co / SiC纳米复合涂层的独特性能与其合金基体和SiC纳米颗粒的含量（8.1％（体积））有关。 （C）2014 Elsevier B.V.保留所有权利。

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