Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 10    No. 4    August 2000

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Effects of addition of rare earth on properties and
structures of Ni-W-B-SiC composite coatings①
GUO Zhong-cheng(郭忠诚), ZHAI Da-cheng(翟大成), YANG Xian-wan(杨显万)

Department of Metallurgy, Kunming University of Science and Technology,
Kunming 650093, P.R.China

Abstract:The effects of rare earth (RE) on the composition, phase structures, surface morphologies and hardness of electrodeposited RE-Ni-W-B-SiC composite coatings were discussed. The results show that W and SiC contents in the coatings increase with the increase of RE in the bath. When RE is added in the coatings, the grains are refined and the trend of formation of amorphous coatings is increased. Moreover, the thermal stability of the RE-Ni-W-B-SiC composite coatings is enhanced. The hardness of the coatings is increased with the increase of heat treatment temperature, and it reaches the peak value when heated at 400℃. Besides, the hardness of the RE-Ni-W-B-SiC coatings is higher than that of the Ni-W-B-SiC coatings.


Key words: RE-Ni-W-B-SiC composite coating; properties; electrodeposition

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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