功率超声—脉冲电沉积Ni-TiN纳米复合镀层制备机理及性能研究

发布时间：2018-04-11 13:19

本文选题：功率超声-脉冲电沉积 + Ni-TiN纳米复合镀层　；参考：《东北石油大学》2017年硕士论文

【摘要】：纳米复合镀层是将特征维度尺寸为1-100 nm(即纳米数量级)的不溶性固体颗粒镶嵌于基体金属中形成的金属基纳米复合材料。从性能上讲,纳米复合镀层中存在一定数量的纳米颗粒,而纳米颗粒自身具有许多独特的物理化学性能,这使得纳米复合镀层表现出诸多优异的性能,包括硬度、耐腐蚀性能、耐磨性能、抗高温氧化性能以及电、光催化性能等。近年来纳米复合镀层受到各界广泛的关注和研究。由于Ni-TiN纳米复合镀层具有诸多优良的性能,如硬度高、较好的耐磨性能、耐腐蚀性能以及高致密度等,在金属表面性能的改善方面得到许多应用。因此,对Ni-TiN纳米复合镀层进行深入研究具有重要意义。随着功率超声技术和电化学沉积方法在制备纳米镀层技术的发展,近年来,国内外有关学者开始将功率超声技术和电化学沉积法结合起来,开展了超声辅助电沉积制备纳米晶体和纳米镀层的初步研究。但相关研究还处于试验研究阶段。综上所述,开展超声场与电场耦合沉积制备复合镀层显得尤为重要。本文通过功率超声-脉冲电沉积技术制备Ni-TiN纳米复合镀层,深入研究超声场和电场复合沉积作用机理。另外,还对沉积所需的装置及复合镀液配方进行研究;同时,对制备Ni-TiN纳米复合镀层过程中影响复合镀层性能的主要因素(TiN纳米颗粒浓度、阴极电流密度、脉冲电源占空比、超声波功率)进行了研究,通过正交实验分析,确定出功率超声-脉冲电沉积制备Ni-TiN纳米复合镀层的最佳工艺参数;此外,还利用扫描电镜(SEM)、显微硬度计、摩擦磨损试验机、高分辨电子显微镜等对复合镀层性能进行较为全面的观察测试(显微硬度、结合力、耐腐蚀性能、耐磨损性能)。以期待为其它类型金属基纳米复合镀层的制备奠定理论与技术基础,拓展纳米复合材料的进一步研究与应用内容。
[Abstract]:Nanometer composite coating is a kind of metal matrix nanocomposite material, which is composed of insoluble solid particles with characteristic dimension of 1-100 nm (nanometer order of magnitude) embedded in the matrix metal.In terms of properties, there are a certain number of nano-particles in nano-composite coatings, while nano-particles have many unique physical and chemical properties, which makes nano-composite coatings exhibit many excellent properties, including hardness and corrosion resistance.Wear resistance, high temperature oxidation resistance and electrical, photocatalytic properties.In recent years, nanocomposite coatings have received extensive attention and research.Ni-TiN nanocomposite coatings have been widely used in improving the surface properties of metals due to their excellent properties such as high hardness, good wear resistance, corrosion resistance and high density.Therefore, it is of great significance to study the Ni-TiN nanocomposite coatings.With the development of power ultrasonic technology and electrochemical deposition technology, in recent years, scholars at home and abroad began to combine power ultrasonic technology with electrochemical deposition.The preparation of nanocrystalline and nanocrystalline coatings by ultrasonic assisted electrodeposition was studied.But the related research is still in the experimental stage.To sum up, it is very important to develop the coupling deposition of ultrasonic field and electric field to prepare composite coatings.In this paper, Ni-TiN nanocomposite coatings were prepared by power ultrasonic and pulsed electrodeposition, and the mechanism of ultrasonic field and electric field composite deposition was studied.In addition, the equipment needed for deposition and the formula of composite plating solution were studied, and the main factors affecting the properties of Ni-TiN nanocomposite coating, such as concentration of tin nanoparticles, cathodic current density, duty cycle ratio of pulse power supply, were also studied.Ultrasonic power) has been studied, and the optimum technological parameters for preparing Ni-TiN nanocomposite coating by power ultrasonic pulse electrodeposition have been determined by orthogonal experimental analysis. In addition, the SEM, microhardness meter, friction and wear tester have also been used.The properties of composite coatings were observed and tested by high resolution electron microscope (microhardness, adhesion, corrosion resistance and wear resistance).It is expected to lay a theoretical and technical foundation for the preparation of other types of metal-based nanocomposite coatings and to expand the further research and application of nanocomposites.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ153

【参考文献】