Investigation of plastic deformation mechanisms and microstructural characteristics of transition metal carbonitrides, Zr(C,N) and Ti(C,N) hard coatings

周期表族4、5和6的过渡金属碳化物、氮化物和碳氮化物具有独特的陶瓷和金属性质的组合，允许在广泛的尖端技术应用中使用。Ti(C，N)是最常用的薄膜涂层之一。近年来，Zr(C，N)化合物受到越来越多的关注和关注，因为它的性能甚至可以超过Ti(C，N)。然而，关于它们相应的力学性能和变形机制的文献却非常稀少。关于塑性，没有关于这些碳氮化物的相应数据和信息。本方案是对Ti(C，N)和Zr(C，N)的力学性能和塑性变形进行深入研究的方案。通过微柱压缩和高分辨显微镜表征来研究单晶的塑性，从根本上了解发生塑性变形的机制。在此基础上，进一步研究了多晶组织特征对CVD硬质合金涂层韧性的影响，以及如何对多晶组织特征进行调整以提高涂层的韧性。

Transition metal carbides, nitrides and carbonitrides of the periodic table groups 4, 5 and 6 possess a unique combination of ceramic and metal-like properties which permits the use in a wide range of cutting-edge technological applications. Ti(C,N) is one of the most used thin coatings. Recently, Zr(C,N) has received an increasing focus and attention due to its promising properties that would even outplay the Ti(C,N). Nevertheless, literature about their corresponding mechanical properties and deformation mechanisms are very scarce. Regarding plasticity, corresponding data and information are not available for these carbonitrides. The present proposal is an in-depth investigation plan of mechanical properties and plastic deformation of Ti(C,N) and Zr(C,N). Plasticity of single crystals will be investigated by micro-pillar compression and high-resolution microscopy characterization to understand fundamentally which are the plastic deformation mechanisms occurring. Afterwards, the investigation is scaled up to study the impact of the polycrystalline microstructure features and how they could be tailored to enhance the toughness of the related polycrystalline CVD hard coating.