【摘要】 采用超声-脉冲电沉积法制备了Ni-TiN-CeO2二元纳米复合镀层,研究了工艺参数对镀层中CeO2及TiN粒子复合量的影响,并对镀层的表面形貌及成分进行了测试和分析。结果表明,超声-脉冲电沉积Ni-TiN-CeO2纳米复合镀层的最佳工艺参数为阴极电流密度4A/dm2,TiN粒子添加量15g/L,CeO2粒子添加量40g/L,正向脉冲占空比20%,超声波功率180W。在该工艺条件下,可获得CeO2质量分数为3.3%、TiN质量分数为4.4%的Ni-TiN-CeO2二元纳米复合镀层。同时,TiN与CeO2二元纳米粒子的加入,充分发挥了两种纳米粒子复合的协同效应,优化了粒子与基质金属的共沉积方式,大大改善了镀层质量。更多还原

【Abstract】 Ni-TiN-CeO2 binary nanocomposite coatings were prepared by ultrasonic-pulse electrodeposition,the effects of the electrodeposition process parameters on the particle content of the Ni-TiN-CeO2 composite coating were reasearched,the surface morphology and composition of the composite coating were also analysed.The results showed that the optimal process parameters of the nanocomposite coating prepared by ultrasonic-pulse electrodeposition was: cathode current density of 4A/dm2,adding amounts of TiN particles was 15g/L,adding amounts of CeO2 particles was 40g/L,positive pulse duty cycle of 20%,ultrasonic power of 180W.Under these optimum conditions,we could prepare Ni-TiN-CeO2 binary nanocomposite coatings with CeO2 and TiN particles mass fraction of 3.3% and 4.4% respectively.Meanwhile,with CeO2 and TiN particles adding to the bath,the composites of the two kinds of nanoparticles gave full play to the synergies,and optimized the sedimentary way of particles and metal matrix,the quality of the coatings was improved greatly.更多还原