Crystallization characteristics of Ni-W-P composite coatings reinforced by CeO2 and SiO2 nano-particles
被引:3
作者:
Xu Rui-dong
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机构:
Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R ChinaKunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Xu Rui-dong
[1
,2
]
Zhai Da-cheng
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机构:
Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R ChinaKunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Zhai Da-cheng
[1
,2
]
Zhang Yu-zhi
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机构:
Chinese Acad Sci, Key Lab Inorgan Coating Mat, Shanghai 200050, Peoples R ChinaKunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Zhang Yu-zhi
[3
]
机构:
[1] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China
[3] Chinese Acad Sci, Key Lab Inorgan Coating Mat, Shanghai 200050, Peoples R China
Ni-W-P composite coatings reinforced by CeO2 and SiO2 nano-particles on the surface of common carbon steels, were prepared by double pulse electrodeposition. The crystallization course was characterized by phase structures, crystallinity, grain sizes and microstructures. The results indicate that as-deposited composite coating is amorphous. Whereas it turns into the crystalline structure with 98.25% crystallinity, and Ni3P, Ni2P and Ni5P2 alloy phases precipitate from structures at 400 degrees C. Thereafter, Ni2P and Ni5P2 metastable alloy phases turn into Ni3P stable alloy phase at 500 degrees C. The crystallization course of the composite coating has finished when being heat-treated at 700 degrees C. The average sizes of Ni grains increase with the rise of heat treatment temperature from 400 degrees C to 700 degrees C. CeO2 and SiO2 nano-particles deposited into Ni-W-P alloys can delay the crystallization course and habit the growth of alloy phases.