Coating materials made of high-entropy alloys for tribologically highly stressed surfaces

用于高摩擦应力表面的高熵合金涂层材料

• 批准号: 415816419
• 负责人: Professor Dr.-Ing. Thomas Lampke
• 金额: --
• 依托单位: Professur Werkstoff- und Oberflächentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/415816419?language=en
• 关键词: Coating; materials; made; entropy; alloys

Beside the further development of classic material concepts, novel alloy systems without a dominating main alloying element offer a promising, scientifically relevant research field with regard to excellent properties of coating systems which are expected to be applicable for highly stressed surfaces. The overarching goal of the proposed project is the investigation of process-microstructure-property relations of high-entropy alloys for the development of thermally sprayed coatings on tribologically highly stressed surfaces. As regards the implementation of the described material concept by means of thermal spraying, the requirements with respect to the chemical composition and homogeneous distribution within the high-entropy alloy represent a great scientific and technical challenge. The powder metallurgical production by atomization appears appropriate to meet these requirements and to provide a feedstock material which is tailor-made for the specific processing conditions of the high-velocity oxygen fuel thermal spray process. The determination of the process time regime considering chemical and structural parameters requires a holistic development approach on the basis of process-material interactions which have to be investigated in the project. The characterization of thermally sprayed coatings, cast ingots and spark plasma-sintered samples facilitates a comparison of the powder metallurgically produced material with the casting process route, especially regarding thermal and atmospheric process conditions. Hence, a comprehensive understanding of the influence of structural parameters as regards surface properties can be gained, therefore establishing a materials science-related basis for applications in the field of surface coating technologies.

除了经典材料概念的进一步发展外，没有主导主要合金元素的新型合金系统还提供了一个有希望的，科学相关的研究领域，该领域就涂层系统的出色特性提供了预期适用于高应力的表面。拟议项目的总体目的是研究高渗透合金的过程 - 微观结构 - 特性关系，以开发在互动高度压力的表面上进行热喷涂的涂层。关于通过热喷涂的描述材料概念的实施，高凝胶合金内化学成分和均匀分布的要求代表了巨大的科学和技术挑战。通过雾化的粉末冶金生产似乎适合满足这些需求，并提供一种原料材料，该材料是针对高速氧气燃料热喷雾过程的特定加工条件量身定制的。考虑化学和结构参数的过程时间制度的确定需要基于过程材料相互作用的整体发展方法，该方法必须在项目中进行研究。热喷涂的涂料，铸造和火花等离子体插图样品的表征有助于比较粉末冶金生产的材料与铸造过程途径，尤其是在热和大气过程条件下。因此，可以获得对结构参数有关表面特性的影响的全面理解，从而为在表面涂料技术领域的应用中建立与科学相关的材料基础。