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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 5    October 2007

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Oxidation resistance of co-deposited Ni-SiC nanocomposite coating
ZHOU Yue-bo(周月波), DING Yuan-zhu(丁元柱)

Department of Materials Science and Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China

Abstract:Ni-6.0%SiC (mass fraction) nanocomposite coating was prepared from a nickel sulfate bath by co-electrodeposition of Ni and SiC nanoparticles in an average size of 30 nm. The oxidation at 1 000 ℃ shows that the Ni-6.0%SiC nanocomposite coating has a superior oxidation resistance compared with the pure Ni film due to the formation of SiO2 oxide particles along grain boundaries, blocking the outward diffusion of Ni and changing the oxidation growth mechanism. The effect of SiC nanoparticles on the oxidation progress was discussed in detail.

 

Key words: Ni; SiC; electrodeposition; composite coating; oxidation

ISSN 1672-7029
CN 43-1423/U

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