Investigation of the influence of architecture and doping of diamond like carbon coatings on the damage behavior under cyclic mechanical stress

为了提高切割的使用寿命和性能，今天，人们寻求多种不同的方法。一种非常有希望的方法是使用类金刚石碳涂层，它减少了摩擦并增加了刀具表面的硬度。然而，这种涂层具有较高的残余应力，相对较低的耐温性。此外，这些特性高度依赖于空气中的湿度。本项目的目的是确定类金刚石碳涂层在循环-机械载荷条件下的力学性能。在这一点上，将查明导致涂层失效的微观结构机制。随后，根据这些发现，将通过改变涂层的层结构和掺杂来单独调整涂层，以获得在循环机械载荷条件下使用的优化的类金刚石涂层。最后，这些优化的类金刚石碳涂层的适用性将在木材加工的应用试验中得到验证。

In order to increase the service life and performance of cutting, today, multiple different approaches are pursued. One highly promising approach is the use of diamond-like carbon coatings, which reduce the friction and increase the hardness of cutting tool surfaces. However, this type of coating exhibits high residual stresses, relatively low temperature resistance. Furthermore, the properties are highly dependent on the humidity in the air. The purpose of this project is to identify the me-chanical properties of the diamond like carbon coatings under cyclic-mechanical load conditions. In this regard, microstructural mechanisms, responsible for the failure of the coatings, will be identi-fied. Subsequently, based on these findings the coatings will be individually adapted by varying the layer architecture and the doping of the coatings in order to obtain optimized diamond-like carbon coatings for the use under cyclic-mechanical load conditions. Finally the applicability of these opti-mized diamond-like carbon coatings will be verified in application tests for wood processing.