کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1490653 | 992329 | 2012 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of duty cycle on the microstructure and microhardness of pulse electrodeposited Ni–CeO2 nanocomposite coating Influence of duty cycle on the microstructure and microhardness of pulse electrodeposited Ni–CeO2 nanocomposite coating](/preview/png/1490653.png)
The Ni–CeO2 nanocomposite coatings have been synthesized by pulse electrodeposition technique with different duty cycles (6, 9 and 17%) from a Watts-type electrolyte containing nano-sized CeO2 particles. The XRD results show that the (2 0 0) orientation is dominant over (1 1 1) orientation in the Ni–CeO2 nanocomposite coatings prepared with 6 and 17% duty cycles, while the opposite is true for the sample prepared with 9% duty cycle. The maximum amount of CeO2 (10 wt%) incorporation in the coating occurs at 9% duty cycle. The crystallite size changes from micrometer to nanometer as the duty cycle changes from 6 to 9%. The hardness increases as the duty cycle increases from 6 to 17%. However, a coating with optimum smoothness and small number of microcracks is obtained at 9% duty cycle.
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► The nano-sized ceria, produced by HEBM technique, co-electrodeposited successfully in the nanocrystalline nickel matrix.
► The (1 1 1) fiber texture is predominant over (2 0 0) fiber in the sample prepared with 9% duty cycle.
► The crystallite size changes from micrometer to nanometer range as the duty cycle increases from 6 to 9 or 17%.
► The microhardness of the nanocomposite coating increases with the increase in the duty cycle.
Journal: Materials Research Bulletin - Volume 47, Issue 2, February 2012, Pages 478–485