Synthesis, structure and deformation behaviour of superhard and damage tolerant PVD thin films based on nano structured nitrides of high-entropy multicomponent alloys

基于高熵多元合金纳米结构氮化物的超硬耐损伤PVD薄膜的合成、结构和变形行为

• 批准号: 443649646
• 负责人: Professor Dr.-Ing. Christoph Leyens
• 金额: --
• 依托单位: Institut für Werkstoffwissenschaft
• 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/443649646?language=en
• 关键词: Synthesis; structure; deformation; behaviour; superhard

Despite a great industrial demand for superhard (hardness > 40 GPa) yet tough thin films with high thermal stability (T > 1000°C) such films can currently not be synthesized. On the one hand side thin films which are typically used for the protection of tools and components only partly fulfill these criteria. On the other hand the deformation and damage behavior determining the mechanical properties of these thin films is not fully understood yet. Therefore the aim of the project proposal is the synthesis of new superhard yet tough thin film systems on the basis of high entropy alloy nitrides, the exploration of their mechanical properties and the determination of the underlying deformation and damage mechanisms. By combining the utilization of HEA nitrides with the design concepts of nanostructured thin films it is assumed that for the first time the three before mentioned criteria can be simultaneously achieved.To establish fundamental principles for the synthesis of new superhard yet tough thin film systems based on HEA nitrides the intended project combines the comprehensive expertise on the development of complex thin films and their resulting mechanical properties (Leyens) with the characterization of the mechanical behavior and damage mechanisms as well as their interrelationships (Zimmermann). In the intended project a comprehensive understanding of the correlation between structure and mechanical properties of the newly developed thin film systems will be established. The obtained results will be generalized and transferred to classical hard nitride systems with fcc structure. From a methodological perspective, techniques for quasi high throughput evalution of the mechanical properties for thin films will be developed and evaluated.

尽管工业界对超硬（硬度> 40 GPa）但具有高热稳定性（T > 1000°C）的坚韧薄膜有很大的需求，但目前还无法合成此类薄膜。一方面，通常用于保护工具和部件的薄膜仅部分满足这些标准。另一方面，决定这些薄膜机械性能的变形和损伤行为尚未完全了解。因此，该项目提案的目的是在高熵合金氮化物的基础上合成新型超硬而坚韧的薄膜系统，探索其机械性能并确定潜在的变形和损伤机制。通过将 HEA 氮化物的利用与纳米结构薄膜的设计概念相结合，首次假设可以同时实现上述三个标准。为了建立合成基于 HEA 氮化物的新型超硬而坚韧薄膜系统的基本原则，预期项目将复杂薄膜开发及其由此产生的机械性能 (Leyens) 的综合专业知识与表征相结合。 机械行为和损伤机制及其相互关系（Zimmermann）。在预期的项目中，将全面了解新开发的薄膜系统的结构和机械性能之间的相关性。所获得的结果将被推广并转移到具有面心立方结构的经典硬氮化物系统。从方法论的角度来看，将开发和评估薄膜机械性能的准高通量评估技术。