High temperature investigation of the tribo mechanical behavior of TiAlSiN and CrAlSiN nanocomposite coatings

TiAlSiN 和 CrAlSiN 纳米复合涂层摩擦力学行为的高温研究

• 批准号: 269564196
• 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: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/269564196?language=en
• 关键词: temperature; investigation; tribo; mechanical; behavior

PVD-coatings are an already established concept for the functionalization of surfaces of cheap substrate materials in order to improve the performance and service life of components without using solid components made of expensive special materials. Until now, tools coated by means of thin-film technology are frequently used in the cutting and cold forming industry, even though these coating systems do not offer sufficient wear resistance and mechanical properties at higher operating temperatures.By using nanocomposite layers, which are developed in the context of the proposed research project, the temperature limitations are expanded by alloying silicon in ternary coating systems (CrAlN and TiAlN) to obtain a thermal and oxidation resistant PVD-coating. Therefore, the influence of different process parameters and PVD technologies on TiAlSiN and CrAlSiN coatings is investigated to determine the correlations between the parameters and the resulting properties of the coating. Especially the influence of different substrate treatment methods, the silicon content, the target power, and the bias voltage on the morphological, mechanical and tribological properties at different temperature levels (20, 250 and 500°C) are closely investigated and evaluated. The investigations are completed by tests carried out in Taiwan, concerning the fatigue behavior at elevated temperatures. The deposition of the PVD coatings at the Institute of Materials Engineering are produced by using the magnetron sputtering process. At the same time, identical coating systems are deposited at a Taiwanese cooperating partner institute by means of an arc-evaporation process. This approach offers the opportunity to compare the different nanocomposite layers regarding their properties and to identify process specific characteristics. Finally, the layers (CrAlSiN and TiAlSiN) with the best properties of both different deposition processes are applied on forming tools and their performance is tested and evaluated in a real forming process with increased operating temperatures.

pvd涂层是一种已经建立的概念，用于廉价基材表面的功能化，以提高部件的性能和使用寿命，而无需使用由昂贵的特殊材料制成的固体部件。到目前为止，通过薄膜技术涂覆的工具经常用于切削和冷成型行业，尽管这些涂层系统在较高的工作温度下不能提供足够的耐磨性和机械性能。通过使用纳米复合层，这是在提出的研究项目的背景下开发的，通过在三元涂层系统（CrAlN和TiAlN）中合金化硅来扩大温度限制，以获得耐热和抗氧化的pvd涂层。因此，研究了不同工艺参数和PVD技术对TiAlSiN和CrAlSiN涂层的影响，以确定参数与涂层性能之间的相关性。重点研究了不同衬底处理方法、硅含量、目标功率和偏置电压在不同温度水平（20、250和500℃）下对形貌、力学和摩擦学性能的影响。研究是通过在台湾进行的关于高温下疲劳行为的试验完成的。材料工程研究所采用磁控溅射工艺制备了PVD涂层。同时，相同的涂层系统在台湾合作伙伴研究所通过电弧蒸发工艺沉积。这种方法提供了比较不同纳米复合材料层的性能和确定工艺特定特性的机会。最后，将两种沉积工艺中性能最好的层（CrAlSiN和TiAlSiN）应用于成形工具上，并在提高操作温度的实际成形过程中对其性能进行了测试和评估。