| STUDY ON PROPERTIES OF PULSE ELECTRODEPOSITED RE-Ni-W-P-SiC COMPOSITE COATINGS |
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| 作者姓名： | Z.C. Guo X.Y. Zhu R.D. Xu |
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| 作者单位： | Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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| 基金项目： | Acknowledgements This work was supported by the National Excellent Doctoral Dissertation of China （No. 2005053）. |
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| 摘 要： | The effects of pulse frequency f and duty cycle r on the deposition rate, composition, morphology, and hardness of pulse electrodeposited RE （rare earth）-Ni-W-P-SiC composite coatings have been studied. The results indicate that pulse current can improve the deposition rate of RE-Ni-W-P-SiC composite coatings; W, P, and SiC contents in the coating decrease with the increase of pulse frequency and reach the lowest value at f = 33Hz, whereas the RE content in the composite coatings increases with the increase of pulse frequency. SiC content decreases with the increase of duty cycle, W content reaches the lowest value, and P content reaches the highest value at r = 0.4; pulse current and RE can lead to smaller size of the crystalline grains; however, the effects of different pulse frequency and duty cycle on the morphologies of RE-Ni-W-P-SiC composite coatings are not obvious. The hardness of RE-Ni-W-P-SiC composite coatings is the highest when the duty cycle is at 0.6 and 0.8 and pulse frequency is at 50Hz. At the same pulse frequency, the hardness of RE-Ni-W-P-SiC composite coatings at r= 0.8 is higher than that at r= 0.6.
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| 关 键 词： | RE-Ni-W-P-SiC复合镀层 性质 脉冲电沉积 脉冲频率 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-09-19 |
Study on Properties of Pulse Electrodeposited RE-Ni-W-P-SiC Composite Coatings |
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| Z.C. Guo X.Y. Zhu R.D. Xu.STUDY ON PROPERTIES OF PULSE ELECTRODEPOSITED RE-Ni-W-P-SiC COMPOSITE COATINGS[J].Acta Metallurgica Sinica(English Letters),2007,20(2):111-116. |
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| Authors: | ZC Guo XY Zhu RD Xu |
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| Affiliation: | Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,Kunming 650093, China |
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| Abstract: | The effects of pulse frequency f and duty cycle r on the deposition rate, composition, morphology,and hardness of pulse electrodeposited RE (rare earth)-Ni-W-P-SiC composite coatings have been studied. The results indicate that pulse current can improve the deposition rate of RE-Ni-W-P-SiC composite coatings; W, P, and SiC contents in the coating decrease with the increase of pulse frequency and reach the lowest value at f =33Hz, whereas the RE content in the composite coatings increases with the increase of pulse frequency. SiC content decreases with the increase of duty cycle, W content reaches the lowest value, and P content reaches the highest value at r=0.4; pulse current and RE can lend to smaller size of the crystalline grains; however, the effects of different pulse frequency and duty cycle on the morphologies of RE-Ni-W-P-SiC composite coatings are not obvious. The hardness of RE-Ni-W-P-SiC composite coatings is the highest when the duty cycle is at 0.6 and 0.8 and pulse frequency is at 50Hz. At the same pulse frequency, the hardness of RE-Ni-W-P-SiC composite coatings at r=0.8 is higher than that at r=0.6. |
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| Keywords: | pulse frequency duty cycle electrodeposition RE-Ni-W-P-SiC composite coating COMPOSITE COATINGS PULSE PROPERTIES different however pulse current size crystalline decreases contents composite coatings increase reach value results improve rare earth hardness morphology |
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