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通过Ni、W、P和CeO2、SiO2纳米颗粒的脉冲共沉积,在普通碳钢表面制备了Ni-W-P-CeO2-SiO2纳米复合镀层,研究了机械搅拌速度对纳米复合镀层微观组织及性能的影响,采用化学组成、元素分布、沉积速率、显微硬度和微观组织进行表征。结果表明:当机械搅拌速度控制在1000r/min时,纳米复合材料微观组织致密,基质金属轮廓清晰,晶粒较细,纳米颗粒以弥散态均匀分布在基质金属中。同时,元素线扫描和面扫描分析表明,W、P、Si和Ce的平均含量非常接近,说明元素在纳米复合镀层中的分布是均匀的。提高机械搅拌速度,纳米复合镀层晶粒得到细化,沉积速率和显微硬度增加,当机械搅拌速度提高到1000r/min时,沉积速率(32.68μm/h)和显微硬度(6820MPa)最高。继续提高机械搅拌速度,纳米复合镀层晶粒尺寸反而增加,沉积速率和显微硬度降低。
The Ni-WP-CeO2-SiO2 nano-composite coating was prepared on the surface of common carbon steel by pulse co-deposition of Ni, W, P and CeO2, SiO2 nanoparticles. The effect of mechanical stirring speed on the microstructure and properties of nano- , Characterized by chemical composition, elemental distribution, deposition rate, microhardness and microstructure. The results show that when the mechanical stirring speed is controlled at 1000 r / min, the microstructure of the nanocomposites is dense, the outline of the matrix metal is clear, and the crystal grains are fine. The nano-particles are uniformly dispersed in the matrix metal in a dispersed state. At the same time, elemental line scanning and surface scan analysis showed that the average content of W, P, Si and Ce are very close, indicating that the element distribution in the nano-composite coating is uniform. When the mechanical stirring speed increased to 1000 r / min, the deposition rate (32.68 μm / h) and the microhardness (6820 MPa) were the highest when the mechanical stirring speed was increased. The grain size of the nanocomposite coating was refined and the deposition rate and microhardness increased. Continue to improve the mechanical stirring speed, nano-composite coating grain size but increased deposition rate and decreased microhardness.