Texture and nanostructure of pyrocarbon layers deposited on planar substrates in a hot-wall reactor

Early stages of the chemical vapor deposition of pyrolytic carbon investigated by atomic force microscopy

“…Once the substrate is completely covered, under appropriate conditions the secondary nucleation is independent of the substrate surface structure and should lead to similar carbon films for different substrates. On the other hand, it has been shown that the substrate can influence the structure of a pyrolytic carbon film well beyond the vicinity of the substrate pyrolytic carbon interface under certain conditions [1].…”

“…aircraft brake assemblies or structural components in aerospace. The interface between carbon fibers and surrounding pyrolytic carbon is crucial for the macroscopic properties of the composite and it has been shown that, depending on the deposition parameters, the properties of the substrate surface can influence the deposition process on the µm-scale [1]. Therefore the initial stages of the deposition of pyrolytic carbon are of great technological interest.…”

Restrictions to the Energy Density in Energetic Models of Carbon Fiber Reinforced Carbon

“…Depending on the scale of observation different microstructures can be observed in CFC [5,6] (see Figure 1). On nanoscale for example, the building blocks of the microstructure are called turbostratic domains and describe regions of a few nm within which the basal planes of carbon possess a common normal vector (see Figure 1c).…”

“…In such models, the different phases of the matrix and the fibers are treated as separate materials with individual mechanical properties. However, only the multi-scale character of the material is taken into account but [7], b) on microscale [6], c) on nanoscale [5].…”

Energetic modelling for carbon fibre reinforced carbon

“…In such a non-convex framework, interfacial contributions serve for relaxing the total energy. Such models can be applied to describe the macroscopic material properties of carbon fibre reinforced carbon where phase transitions between regions of different texture of the carbon matrix are observed on nanoscale as well as columnar microstructures on microscale [2]. …”