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J Chin Soc Corr Pro  2009, Vol. 29 Issue (2): 141-144    DOI:
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MICROHARDNESS OF Ni-Co ALLOY PLATED BY HIGH FREQUENCY PULSE CURRENTS
XU Yunhua1;CAO Kening2;YANG Yuguo1;ZHAO Yu1; GONG Xiaojing1
1.School of Sciences; Beijing Jiaotong University; Beijing 100044
2.Beijing Spacecrafts; Beijing 100081
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Abstract  

Ni-Co alloys were deposited by applying current pulses from a sulfate electrolyte. The effect of the ionic concentration of cobalt in the electrolyte and pulse parameters on the cobalt content in the deposits and the microhardness of the deposits were studied. The morphologies and metallic phases of the alloys were analysed by scanning electron microscope(SEM) and X-ray diffraction(XRD). The results indicated that the cobalt content in alloy deposits had a strong effect on its hardness, and the increase of cobalt content resulted in increasing of the hardness of the deposits. At low cobalt content, pure face centered cubic (fcc) structure was identified.

Key words:  High frequency      Ni-Co alloys      Microhardness      Microstructure     
Received:  02 July 2007     
ZTFLH: 

TQ153.2

 
Corresponding Authors:  XU Yunhua     E-mail:  yhxu@bjtu.edu.cn

Cite this article: 

XU Yunhua CAO Kening YANG Yuguo ZHAO Yu GONG Xiaojing. MICROHARDNESS OF Ni-Co ALLOY PLATED BY HIGH FREQUENCY PULSE CURRENTS. J Chin Soc Corr Pro, 2009, 29(2): 141-144.

URL: 

https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y2009/V29/I2/141

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