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首页> 外文期刊>Journal of Materials Engineering and Performance >Electrodeposition and Characterization of Ni-Al 2O 3 Nanocomposite Coatings on Steel
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Electrodeposition and Characterization of Ni-Al 2O 3 Nanocomposite Coatings on Steel

机译：Ni-Al <下标> 2 O <下标> 3 纳米复合涂层对钢的电沉积和表征

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摘要

Monodispersed alumina particles were synthesized by the homogeneous precipitation under reflux boiling. The particles were employed as reinforcement additives in the electrodeposited Ni-Al~(2)O~(3)composite coatings on steel. The deposited pure Ni and Ni-Al~(2)O~(3)composite coatings were analyzed by SEM, XRD, and microhardness tester. The wear resistance and friction coefficient of the coated samples were determined by using a ball-on-disk tribometer. Furthermore, XRD analysis showed that coating temperature and the presence of particles in the deposited coatings had a noticeable effect on the preferred orientation of the crystalline faces of the nickel grains. Significant differences were noted in the texture coefficient of the pure Ni and Ni-Al~(2)O~(3)composite coatings produced at different temperatures. These differences were attributed to the changes in the microstructure of the matrix caused by the embedded Al~(2)O~(3)particles. Results revealed that wear resistance and the friction coefficient were turned out to be higher and smaller, respectively, for the composite coatings as compared to pure Ni coating at a given sliding distance. It was noted that the corrosion resistance of these specimens increased in the following order: bare substrate?
机译：通过回流沸腾下的均匀沉淀合成单分散的氧化铝颗粒。将颗粒作为钢电沉积的Ni-Al〜（2）O〜（3）复合涂层中的增强添加剂。通过SEM，XRD和微硬度测试仪分析沉积的纯Ni和Ni-Al〜（2）O〜（3）复合涂层。通过使用球盘摩擦计确定涂覆样品的耐磨性和摩擦系数。此外，XRD分析表明，沉积涂层中的涂层温度和颗粒的存在对镍颗粒的结晶面的优选取向具有显着的影响。在不同温度下产生的纯Ni和Ni-Al〜（2）O〜（3）复合涂层的纹理系数中发现了显着差异。这些差异归因于由嵌入的Al〜（2）O〜（3）颗粒引起的基质微观结构的变化。结果表明，与给定滑动距离的纯Ni涂层相比，耐磨性和摩擦系数分别为更高且较小，分别用于复合涂层。注意，这些试样的耐腐蚀性在以下顺序增加：裸衬底？<×纯Ni涂层β-（3）纳米复合材料涂层。

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