Tribo-active HPPMS-PVD (Cr,Al)N coatings

本研究项目的主要目的是获得润滑油与（Cr,Al）N涂层在混合摩擦区相互作用的基本知识。特别强调了在涂层中使用摩擦活性元素X （W, Ta, Mo, Cu）和创新的HPPMS（高功率脉冲磁控溅射）-PVD（物理气相沉积）技术。作为DLC（类金刚石碳）涂层的替代方案，一种热稳定得多的减少摩擦和耐磨涂层将被开发出来，用于在高温下润滑机器元件。在大多数情况下，润滑剂含有许多不同的添加剂，这些添加剂针对金属表面的应用进行了优化。因此，必须分析含有润滑剂的添加剂与部件金属表面摩擦活性元素之间的协同作用是否可以转移到掺杂摩擦活性元素的（Cr,Al） n - hppms - pvd涂层上。考察了摩擦活性元素和涂层参数对涂层性能和复合性能的影响。在摩擦学研究中分析了摩擦和磨损对系统性能的影响。通过这种方式，特别是通过使用微拉曼光谱，可以获得关于摩擦化学反应层的形成和组成的基本见解，以及对（Cr,Al） n - hppms涂层中摩擦活性元素与润滑剂添加剂之间相互作用的理解。

The primary objective of this research project is to gain fundamental knowledge of the interactions between lubricants and (Cr,Al)N coatings in mixed friction area. Specific emphasis is given to the use of tribo-active elements X (W, Ta, Mo, Cu) in the coatings and the innovative HPPMS (High Power Pulse Magnetron Sputtering)-PVD (Physical Vapour Deposition)-technology. Alternatively to DLC (Diamond Like Carbon) coatings a much more thermally stable class of friction-reducing and wear-resistant coatings for the application on lubricated machine elements at elevated temperatures is to be developed. In most cases lubricants contain many different additives which are optimised for the application on metallic surfaces. As a result of this, it has to be analysed whether the synergistic effects between the additive containing lubricants and the tribo-active elements of the metallic surface of the component can be transferred to the (Cr,Al)N-HPPMS-PVD-coatings, which are doped with tribo-active elements. The influence of the tribo-active elements as well as the coating parameters on the coating and compound properties are examined. The impact on the system properties friction and wear are analyzed in tribological investigations. In this way especially by using micro raman spectroscopy fundamental insights concerning the formation and composition of tribo-chemical reaction layers are to be achieved as well as an understanding of the interactions between the tribo-active elements of the (Cr,Al)N-HPPMS-coatings and the additives of lubricants is to be obtained.