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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Microstructure of electrodeposited RE-Ni-W-P-SiC composite coating①
GUO Zhong-cheng(郭忠诚), ZHU Cheng-yi(朱诚意), ZHAI Da-cheng(翟大成), YANG Xian-wan(杨显万)

Department of Metallurgy, Kunming University of Science and Technology, Kunming650093, P.R.China

Abstract:The components and microstructure of the RE-Ni-W-P-SiC composite coating were analyzed by means of EPXDS, SEM and XRD. The results showed that the composite coating containing 5%~14%RE, 4%~7%SiC, 12%~15%P and 5%~6%W was obtained by use of appropriate bath composition and plating conditions. The as-deposited composite coating is amorphous and it becomes mixture when the temperature is raised from 200℃to 400℃. However,
the composite coating is crystal when the temperature is over 400℃. Scanning electron microscopy indicates that the heat treatment temperature has no effect on the surface morphologies of the RE-Ni-W-P-SiC composite coating. This is to say that the composite coating has a better heat stability of microstructure and high temperature oxidation.

 

Key words: electrodeposition; RE-Ni-W-P-SiC composite coating; microstructure

ISSN 1672-7029
CN 43-1423/U

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