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Fretting wear-resistance of Ni-base electro-brush plating coating reinforced by nano-alumina grains

机译:纳米氧化铝颗粒增强镍基电刷镀层的微动耐磨性

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摘要

The electro-brush plating technology is an important one in surface modification. The Ni-base plating coating reinforced by n-Al_2O_3 (noting as n-Al_2O_3/Ni composite coating), which the nano-grains dispersed evenly and combined tightly with matrix metal nickel, was prepared through adding nano-Al_2O_3 ceramic grains into the Ni-base bath. The experimental results illustrated that the micro-hardness and fretting wear-resistance of n-Al_2O_3/Ni composite coating were superior to that of the common rapid Ni-base plating coating. The reason was that the nano-Al_2O_3 ceramic grains changed the crystallizing condition of coating, so the coating was strengthened by fine-crystal intensification, high-density dislocation intensification and hard grains dispersion intensification.
机译:电刷镀技术是表面改性的重要技术。通过在Ni中添加纳米Al_2O_3陶瓷晶粒,制备了纳米晶粒均匀分散并与基体金属镍紧密结合的,由n-Al_2O_3增强的Ni基镀层(记为n-Al_2O_3 / Ni复合涂层)。基浴。实验结果表明,n-Al_2O_3 / Ni复合镀层的显微硬度和微动磨损性能优于普通的快速Ni基镀层。原因是纳米Al_2O_3陶瓷晶粒改变了涂层的结晶条件,因此通过细晶强化,高密度位错强化和硬质颗粒分散强化来强化涂层。

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