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之外，没有主导主要合金元素的新型合金系统提供了一个有前途的，科学相关的研究领域，该领域有望适用于高应力表面的涂层系统的优异性能。该项目的总体目标是研究高熵合金的工艺-微观结构-性能关系，以开发摩擦学高应力表面上的热喷涂涂层。关于通过热喷涂实现所描述的材料概念，关于高熵合金内的化学组成和均匀分布的要求代表了巨大的科学和技术挑战。雾化粉末冶金生产似乎适合满足这些要求，并提供针对高速氧燃料热喷涂工艺的特定加工条件量身定制的原料。考虑到化学和结构参数的工艺时间制度的确定需要一个整体的开发方法的基础上，必须在项目中进行调查的过程-材料的相互作用。热喷涂涂层、铸锭和火花等离子烧结样品的表征有助于将粉末冶金生产的材料与铸造工艺路线进行比较，特别是在热和大气工艺条件方面。因此，可以获得结构参数对表面性能的影响的全面理解，从而为表面涂层技术领域的应用建立材料科学相关的基础。