Ni–Al2O3 composite coatings were prepared with a modified Watt’s bath by using jet electrodeposition method. As the key process parameter, current density and the addition of Al2O3 nanoparticles in electrolyte were studied about the effect on the surface morphology and co-deposition of Al2O3 nanoparticles of composite coating. The mechanical and tribological properties of the composite coating were also tested. The results show that properly increasing the current density and Al2O3 addition can increase the co-deposition of nanoparticles in the coating and promote the formation of a dense and refined coating structure. Using the optimized process parameters of current density (300 A/dm2) and Al2O3 addition (30 g/L), the co-deposition of Al2O3 in the composite coating can reach a maximum of 13.1 at.%. The hardness of the coating reaches the peak at 623 HV. The wear rate of the composite coating is also greatly reduced with optimized parameters.

中文翻译：

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喷射电沉积改善Ni-Al2O3复合涂层的微观结构和性能

镍铝2○3采用喷射电沉积法，采用改性瓦特浴制备复合涂层。作为关键工艺参数，电流密度和Al的添加2○3研究了电解液中纳米粒子对Al表面形貌和共沉积的影响2○3复合涂层的纳米颗粒。还测试了复合涂层的机械和摩擦学性能。结果表明，适当增加电流密度和 Al2○3添加可以增加纳米粒子在涂层中的共沉积，促进形成致密和精细的涂层结构。使用电流密度的优化工艺参数（300 A/dm2) 和铝2○3添加 (30 g/L)，Al 的共沉积2○3在复合涂层中最高可达13.1 at.%。涂层的硬度在 623 HV 时达到峰值。随着参数的优化，复合涂层的磨损率也大大降低。