Effect of Deposition Mechanism and Microstructure of Nano-Ceria Oxide Addition on Ni-P Coating by Pulse Electrodeposition

Xiao Wei Zhou; Yi Fu Shen; Hui Ming Jin

doi:10.4028/www.scientific.net/AMR.326.151

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Effect of Deposition Mechanism and Microstructure of Nano-Ceria Oxide Addition on Ni-P Coating by Pulse Electrodeposition

Abstract:

Pulse current (PC) electro-deposition combined with the ultrasonic (U) field has been used to fabricate pure nickel and nickel-ceria composite coatings. Morphology, ceria (RE) composite, and crystal-texture were observed and analyzed by using environment scanning electron microscopy equipped with energy dispersive X-ray analysis (ESEM/EDAX) and transmission electron microscopy (TEM). Experimental results indicate that it produced the alloying coatings, exhibiting compact grain and be of amorphous state. Nano-sized RE would preferentially occupy and pad the defective area between the cracked gap and micropores to limit the growth of the original Ni grain, and far from coarse grain. Furthermore, during annealed at 500 °C for 2 h, dispersing a solid-solution precipitated phase named NiCe_xO_1-x (0<x<0.5), it would make diffused sufficiently to promote densification and microhardness greatly.

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Advanced Materials Research (Volume 326)

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151-156

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https://doi.org/10.4028/www.scientific.net/AMR.326.151

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September 2011

Authors:

Xiao Wei Zhou, Yi Fu Shen, Hui Ming Jin

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Deposition Mechanism, Microstructure, Ni-P/N-CeO₂, Pulse Electrodeposition

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