Electroplated reactive nanoparticle dispersed coatings

电镀反应性纳米粒子分散涂层

• 批准号: 459278559
• 负责人: Professor Dr. Andreas Bund
• 金额: --
• 依托单位: Fachgebiet Nanotechnologie (NANO)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/459278559?language=en
• 关键词: Electroplated; reactive; nanoparticle; dispersed; coatings

Reactive layer systems are combinations of at least two materials (mostly metals) whose reaction with each other shows a strongly negative enthalpy. State of the art are e.g. Ni-Al multilayers, which are produced by PVD processes. Applications for reactive layers arise in joining technology, where the rapid release of large amounts of heat in a small, well-defined space is required. In this project, particulate reactive layer systems will be produced by electrochemical deposition from ionic liquids (ILs). A special gas phase process will be used for the preparation of nano- to micro-scale particles, in which the particles are obtained as a dispersion in an IL. This dispersion then serves as the basis for an electroplating bath from which the layers are electrochemically deposited. For a reactive Ni-Al system, Ni particles can be dispersed in an Al electrolyte, or Al particles in a Ni electrolyte. Structure-reactivity relationships will be investigated at the deposited layers with various analytical methods (high speed thermography, XRD, FIB, TEM etc.). Among others, the question of how the size and distribution of the particles affect the reaction speed of the layer will be investigated. In the electrochemical preparation process, particular attention will be paid to the stabilization of the particles in the IL and a better understanding of the deposition process. Open questions arise regarding the role of the surface charge of the particles in the IL. Can classical theories for the deposition mechanism of composite coatings in aqueous media describe the process under consideration in this project? Overall, it is expected that the state of knowledge regarding the preparation methods and structure-property relationships of reactive layer systems will be significantly expanded. This basic knowledge will then form the basis for tailoring reactive coating systems for new applications.

反应层系统是至少两种材料(主要是金属)的组合，它们之间的反应显示出强烈的负热。最先进的是例如通过PVD工艺生产的Ni-Al多层膜。反应层的应用出现在连接技术中，在这种技术中，需要在一个小的、定义明确的空间内快速释放大量热量。在这个项目中，粒子反应层系统将通过离子液体(ILS)的电化学沉积来产生。将使用一种特殊的气相过程来制备纳米到微米级的颗粒，在这种过程中，颗粒以分散在IL中的形式获得。然后，这种分散体作为电镀液的基础，从电镀液中电化学沉积各层。对于反应性Ni-Al体系，Ni颗粒可以分散在Al电解液中，Al颗粒可以分散在Ni电解液中。将用各种分析方法(高速热成像、X射线衍射仪、FIB、透射电子显微镜等)研究沉积层的结构-反应性关系。其中，将研究颗粒的大小和分布如何影响层的反应速度的问题。在电化学制备过程中，要特别注意IL中粒子的稳定和对沉积过程的更好的了解。关于粒子表面电荷在IL中的作用，出现了一些悬而未决的问题。复合涂层在水介质中沉积机理的经典理论能否描述本项目正在考虑的过程？总体而言，预计关于反应层体系的制备方法和结构-性质关系的知识状态将得到显著扩展。这些基础知识将成为为新应用量身定制反应性涂层系统的基础。