Probe into deposition mechanism of double pulse electrodepositing Ni-W-P matrix composite coatings containing CeO2 and SiO2 nano-particles
被引:4
作者:
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王军丽
[1
]
章俞之
论文数: 0引用数: 0
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机构:
Key Laboratory of Inorganic Coating Materials,Chinese Academy of SciencesResearch Center for Analysis and Measurement,Kunming University of Science and Technology
章俞之
[2
]
徐瑞东
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Faculty of Metallurgical and Energy Engineering,Kunming University of Science and TechnologyResearch Center for Analysis and Measurement,Kunming University of Science and Technology
徐瑞东
[3
]
詹鹏
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Faculty of Metallurgical and Energy Engineering,Kunming University of Science and TechnologyResearch Center for Analysis and Measurement,Kunming University of Science and Technology
詹鹏
[3
]
机构:
[1] Research Center for Analysis and Measurement,Kunming University of Science and Technology
[2] Key Laboratory of Inorganic Coating Materials,Chinese Academy of Sciences
[3] Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology
Ni-W-P matrix composite coatings reinforced by CeO2 and SiO2 nano-particles were prepared on common carbon steel surface by double pulse electrodeposition and the deposition mechanism was discussed.The results showed that the composite coatings with amorphous structure were obtained as-deposited.The initial growth behavior had alternatives and the nucleation was inhomogeneous because of obvious composition fluctuation.With the pulse deposition time increasing,some pearlite microstructures of the substrate were covered by some deposits and the composition fluctuation disappeared.Forward pulse currents promoted to form a great number of atomic beams composed of Ni,W and P atoms or CeO2 and SiO2 nano-particles as the core,which inhabited the growth of atomic beams.Reverse pulse currents eliminated concentration polarization and dissolved some surface boss of atomic beams.The solution of W and P atoms within Ni grains and embedding of CeO2 and SiO2 nano-particles within Ni-W-P matrix metal made atomic arrangement disordered.Finally,the atomic beams grew to amorphous small particles.
Effects of rare earth on microstructures and properties of Ni-W-P-CeO2-SiO2 nano-composite coatings[J]. 徐瑞东,王军丽,郭忠诚,王华.Journal of Rare Earths. 2008(04)
Effects of rare earth on microstructures and properties of Ni-W-P-CeO2-SiO2 nano-composite coatings[J]. 徐瑞东,王军丽,郭忠诚,王华.Journal of Rare Earths. 2008(04)