脉冲电镀Ni—ZrO2纳米复合镀层工艺及性能研究毕业论文.doc

脉冲电镀Ni—ZrO2纳米复合镀层工艺及性能研究 摘要 复合电镀是用电镀的方法使金属与固体微粒共沉积来获得所需镀层的一种工艺过程，是使普通的金属材料表面获得高硬度、高耐腐蚀等性能，最直接和最有效的方法。复合镀层中纳米粒子的加入，使复合镀层显示出了比一般材料更为优异的物理和化学性能，它的出现给复合电镀技术带来了新的发展方向。本文对镍基纳米ZrO2复合镀层的脉冲电沉积工艺进行了实验研究，采用正交试验法对脉冲电沉积镍基纳米ZrO2复合镀层工艺的影响因素进行了研究，该实验以脉冲电源为施镀电源，以硬度作为考察指标，。实验结果表明，电镀最佳工艺参数为：脉冲频率为1500Hz、ZrO2粒子浓度为7g/L、占空比为60%。由此最佳工艺条件下制备出的Ni—ZrO2纳米复合镀层硬度值高、耐蚀性好、且组织结构性能良好。 关键词：脉冲电镀；纳米ZrO2；镀层硬度；耐蚀性 Process and properties of pulse electroplating Ni - ZrO2 nano composite plating Abstract Composite electroplating is electroplating method so that the metal and solid particle deposition to obtain a desired coating a process, is that ordinary metal material surface to obtain high hardness, high corrosion resistance, the most direct and effective method.Composite coating of nanoparticles to join, so that the composite coatings show than the general materials for their excellent physical and chemical properties, it appears to the composite plating technology has brought new development direction.In this paper, ZrO2 on nickel based nano composite coating by pulse electrodeposition process was studied, using orthogonal test method for pulse electrodeposition nickel based nano composite coating process of ZrO2 were studied, the experiment with pulse power supply for plating power supply, use a durometer hardness, and the scanning electron microscope on the coating structure the observation.The experimental results show that the optimum process parameters were: electroplating, pulse frequency is 1500Hz, ZrO2 particle concentration is 7g / L, 60% duty cycle.The prepared under the optimum process conditions of Ni - ZrO2 composite coating hardness high, good corrosion resistance, and good organization structure. Keywords: pulse electroplating; nanometer ZrO2; hardness; corrosion resistance  1绪论 人类发展的历史证明，材料是社会进步的物质基础和先导，是人类进步的里程碑。纵观人类利用材料的历史，可以清楚地看到，每一种重要材料的发现和利用，都会把人类支配和改造自然能力提高到一个新的水平，给社会生产力和人类生活带来巨大的变化。当前以信息、生命和材料三大学科为基础的世界规模的新技术革命风涌兴起，它将人类的物质文明推向一个新阶段。在新材料研究、开发和应用，在特种性能的充分发挥以及传统材料的改性等诸多方面，材料科学都肩