| 摘要: |
| 在不同镀液温度下直流电沉积制备NiSiC纳米复合镀层，利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）和能谱仪（EDX）对镀层的相组成、表面形貌、成分等进行表征，考察镀液温度对镀层的微观形貌、晶体生长和镀层中SiC含量等影响。结果表明：随着温度升高，NiSiC晶粒从无序取向渐变为（220）择优取向，到70 ℃时(220)面的晶面织构系数达到最大值；镀层中纳米SiC含量随着温度的升高先增大后减少，在60 ℃时达到最大值；纳米SiC微粒的加入可抑制镍晶的晶粒生长，从而细化晶粒，并使镍晶产生晶格畸变；NiSiC纳米复合镀层的表面形貌随温度的升高，表面颗粒更加细化和均匀。 |
| 关键词: 镀液温度 NiSiC纳米复合镀层 表面形貌 择优取向 晶格畸变 |
| DOI：10.3969/j.issn.1007-9289.2013.06.012 |
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| Effect of Bath Temperature on Microstructure of Ni-SiC Nanocomposite Coating by Electrochemical Deposition |
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HU XiaoGang, ZHANG Min, PAN YuLi, HUANG Ye, CHENG ShiHong, DING YongWen, PEI YaTao1,2
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1.School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning;2.BorgWarner United Transmission Ltd., Dalian 116600, Liaoning
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| Abstract: |
| NiSiC nanocomposite coatings were electrodeposited in Watt’s solutions with different bath temperatures through DC electrochemical method. The effects of bath temperature on the microstructure, crystal growth and SiC content in the coatings were investigated by Xray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS). The results show that the Ni grain orientation gradually changes from disorder to (220) preferred orientation, and obtains the highest texture coefficient at 70 ℃ with increasing bath temperature. SiC content in the coatings first increases and then decreases with the increase of the bath temperature, and SiC content attains the maximum at 60 ℃. The addition of particles restrains the growth of the Nickel crystals, resulting in grain refinement and lattice distortion. As the bath temperature increases, the particles on coating surface become much finer and the coating becomes much smoother. |
| Key words: bath temperature NiSiC nanocomposite coating surface morphology preferred orientation lattice distortion |
