Synthesis and characterization of Ni–P coated hexagonal boron nitride by electroless nickel deposition
Electroless plating has been receiving a steady progress over the last decade on the modification of the surface properties of ceramic materials in order to produce composite coatings with unique characteristics for critical tribological systems. In this work, an electroless nickel deposition proc...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Allerton Press
2015
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/46743/ http://irep.iium.edu.my/46743/ http://irep.iium.edu.my/46743/1/P104_2015_SEAE_Kamilu.pdf http://irep.iium.edu.my/46743/4/46743_Synthesis_and_characterization_of_Ni%E2%80%93P_coated_SCOPUS.pdf |
| Summary: | Electroless plating has been receiving a steady progress over the last decade on the modification of
the surface properties of ceramic materials in order to produce composite coatings with unique characteristics
for critical tribological systems. In this work, an electroless nickel deposition process was used to deposit
nickel-phosphorous (Ni–P) coating on hexagonal boron nitride (h-BN) particles via hypophosphite-
reduced acid bath solution. The substrate particles were initially subjected to series of pre-treatment opera-
tion in order to ensure that the particles are cleaned and catalytically active prior to electroless plating. The
characterization of the as-received and Ni-coated powder was studied through scanning electron microscopy
(SEM), energy dispersive X-ray (EDX) spectroscopy and field emission scanning electron microscopy
(FESEM). The result reveals that the pretreatment of h-BN powder provides substrate particle surfaces with
coarse and roughened structures which are normally considered suitable for Ni–P deposition. Moreover, the
result of the EDX analysis confirms the existence of nucleating agents and Ni–P coating on the surface of the
treated h-BN powder. The cross-sectional microstructure of the coated powder shows that the h-BN particles
were embedded in a continuous matrix layer of Ni–P deposit. The EDX mapping profiles further indicate
that the deposited Ni–P alloy mass was uniformly distributed on the surface of the Ni–P codeposited h-BN
particles (Ni–P–h-BN). The successful development of Ni coated h-BN powder will raise the potential of
h-BN as a high-performance coating material. |
|---|