Investigation of the influence of the manufacturing conditions and the design on the tribo-mechanical properties and residual stresses of PVD multilayer systems

研究制造条件和设计对 PVD ​​多层系统摩擦机械性能和残余应力的影响

• 批准号: 191961127
• 负责人: Professor Dr.-Ing. Wolfgang Tillmann
• 金额: --
• 依托单位: Lehrstuhl für Werkstofftechnologie (LWT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/191961127?language=en
• 关键词: Investigation; influence; manufacturing; conditions; design

The residual stresses present in the PVD coatings multilayer systems have high influence in their final tribo-mechanical behaviour. In previous experiments where different multilayer systems of Ti/TiAlN where deposited by means of DCMS, has been proved that the concentration of high compressive residual stresses promote the generation of cracks and spallation of the coatings. Additionally, was evidenced that compressive residual stresses increased with increasing thickness of the metallic interlayers deposited by means of DCMS, and thus, affecting tribological and mechanical properties of the compounds multilayer/substrate. It is assumed that this behavior is due to the microstructural differences of the Ti-interlayers.On this basis, the microstructure of Ti/TiAlN multilayer coatings should be varied selectively by means of HiPIMS technology. The comparison of these coating with the above mentioned, allow demonstrating the influence of different microstructures and growing mechanisms on the residual stresses of PVD multilayer coatings. For this purpose, Ti/TiAlN HiPIMS coating designs are evalu-ated by XRD and their residual stresses depth profiles generated through cross- sectional X-ray nanobeam diffraction analysis. Moreover, due to the high residual stresses and poor tribo-mechanical response of the Ti/TiAlN coatings deposited by means of DCMS, a new combination of materials are proposed for these section of the project, TiAlN/TiAlCN. The combination of two materials which exhibit great corrosion resistant and high thermal stability together with improved tribo-mechanical behavior, because of the incorporation of carbon. Besides, and in terms of thermal residual stresses, the similarity between the new two materials, both are ceramics, has a great effect in their thermal expansion coefficients, which are also similar. Thus, thermal induced residual stresses in the system are re-duced notably.Finally and to draw conclusions about the coating architecture and combinations of materials in multilayer systems, tribo-mechanical experiments as nanoindentation, ball-on-disk experiments, scratch tests and impact tests are conducted and compared between them and the results from previous experiments.

PVD涂层多层系统中存在的残余应力对其最终的摩擦学行为具有很大影响。在先前的实验中，通过DCMS沉积的Ti/TiALN的不同多层系统已被证明，高压缩残留应力的浓度促进了裂纹的产生和涂层的剥落。另外，证明了压缩残留应力随着DCMS沉积的金属层间厚度的增加而增加，从而影响化合物多层/底物的摩擦学和机械性能。假定这种行为是由于Ti-Interlayers的微观结构差异引起的。在此基础上，Ti/Tialn多层涂层的微观结构应通过HIPIMS技术选择性地变化。这些涂层与上述涂层的比较，允许证明不同的微观结构和增长机制对PVD多层涂层的残余应力的影响。为此，XRD评估了Ti/Tialn Hipims涂层设计，其残留应力深度曲线通过横截面X射线纳米骨骼衍射分析产生。此外，由于通过DCMS沉积的Ti/Tialn涂层的高残留应力和不良的底环机械响应，因此提出了针对该项目的这些部分Tialn/Tialcn的新材料组合。由于碳的掺入，两种材料的组合以及具有改善的底环机械行为以及改进的底环机械行为的组合。此外，就热残留应力而言，新两种材料之间的相似性，都是陶瓷，对其热膨胀系数具有很大的作用，这也相似。因此，系统中的热诱导的残余应力被显着重新引入。并得出关于多层系统中涂料结构和材料组合的结论，摩力学实验，作为纳米指示，在磁盘上的磁盘实验，进行刮擦测试，并在先前的实验中进行了刮擦测试，并进行了比较。