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Reusing oxide-based pulverised fly ash and medical waste particles to develop electroless nickel composite coatings (Ni-P/fly ash and Ni-P/SiO 2 -Al 2 O 3 )
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-020-2071-7
Franco Mayanglambam , Mark Russell

Recycling and reusing materials from waste have become a nexus in the development of sustainable materials, leading to more balanced technologies. In this study, we developed a composite coating by co-depositing recycled ceramic particles, pulverised fly ash (PFA) and medical ceramics (MC), into a nickel-phosphorus matrix using a typical electroless plating process. Scanning electron microscopy (SEM) images indicated well-dispersed particles in the Ni-P matrix. However, compared with the MC particles, the PFA particles were distributed scantily with a lower content in the matrix, which could be due to the less impingement effect during the co-deposition. A modified microstructure with refined grains was obtained for the PFA-incorporated composite coating, as seen in the SEM micrograph. The X-ray diffraction result of the MC-incorporated composite coating showed the formation of NixSiy phases in addition to the typical Ni3P phases for the heat-treated electroless Ni-P coatings. Upon heat treatment, the PFA-reinforced composite coating, due to a modified microstructure, exhibited a higher microhardness up to HK0.05 818, which is comparable to that of the traditional SiC particle-embedded composite coating (HK0.05 825). The findings can potentially open up a new strategy to further advance the green approach for industrial surface engineering.



中文翻译:

再利用氧化物基粉煤灰和医疗废物颗粒开发化学镀镍复合涂层(Ni-P /粉煤灰和Ni-P / SiO 2 -Al 2 O 3)

从废物中回收和再利用材料已成为可持续材料开发的纽带,从而导致技术更加平衡。在这项研究中,我们通过使用典型的化学镀工艺将回收的陶瓷颗粒,粉煤灰(PFA)和医用陶瓷(MC)共沉积到镍-磷基体中,从而开发了一种复合涂层。扫描电子显微镜(SEM)图像表明在Ni-P基体中分散良好的颗粒。然而,与MC颗粒相比,PFA颗粒在基体中的分布较少,含量较低,这可能是由于共沉积过程中的冲击效应较小。从SEM显微照片中可以看到,掺有PFA的复合涂层具有细化晶粒的改性微观结构。除热处理的化学镀Ni-P涂层的典型Ni 3 P相之外,还包括x Si y相。热处理后,由于微结构的改变,PFA增强的复合涂层表现出更高的显微硬度,高达HK 0.05 818,与传统的SiC颗粒嵌入复合涂层(HK 0.05 825)相当。这些发现有可能为进一步发展工业表面工程的绿色方法打开新的战略。

更新日期:2020-08-15
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