Noble electroless Ni-P deposited hexagonal boron nitride for effective solid lubricant application
The hexagonal boron nitride (hBN) is a potential solid lubricating material; however, it has few limitations such as less surface activation, poor wettability, inhomogeneous mixture with substrate materials etc. This can be overcome via co-deposition of highly activated materials. Therefore, the pre...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/35824/1/Poster-10_Kamilo_Final_Feb_14.png http://irep.iium.edu.my/35824/2/MTE2014_Silver.pdf http://irep.iium.edu.my/35824/ |
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| Summary: | The hexagonal boron nitride (hBN) is a potential solid lubricating material; however, it has few limitations such as less surface activation, poor wettability, inhomogeneous mixture with substrate materials etc. This can be overcome via co-deposition of highly activated materials. Therefore, the present invention was aimed to co-deposit Ni-P alloy on hexagonal boron nitride (hBN) powder via electroless plating technique. The electroless nickel deposition was conducted in hypophosphite-reduced acid bath containing NiSO4 as the source of nickel. The characterization of co-deposited hBN was performed by means of scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), field emission scanning electron microscopy (FESEM) and x-ray diffraction (XRD) analyzer. The morphologies of Ni-P co-deposited hBN suggested a good metallurgical bonding and uniform distribution of the powders with the existence of Ni3P phase. Elemental mapping also confirmed the deposition of Ni-P onto hBN substrate. Hence, it can be claimed that the co-deposition provides a highly active surface of hBN powder. Furthermore, this co-deposited hBN powder can be used as an efficient solid lubricant for tribological application where introducing liquid lubricant is very difficult. This co-deposited hBN is expected to show better wettability with the metallic matrix as well as excellent thermal stability. The novelty in this invention is that a noble electroless deposition technique was successfully applied toco-deposit Ni-P on hBN powder. |
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