Activity Titanium- and Tantalum-based CVD coatings

Internally funded project


Project Details

Project leader:
PD Dr.-Ing. Stefan Rosiwal


Contributing FAU Organisations:
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Start date: 01/01/2000


Research Fields

Ultra Hard Coatings
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Abstract (technical / expert description):


Since Iron and Cobalt catalyse graphite formation during the CVD diamond deposition, high temperature intermediate layers are developed, which inhibit graphite forming on steel or hard metal surfaces. A special surface microstructure of the intermediate layer alloys a good mechanical adhesion with the subsequently growing diamond layer.



In the temperature range from 500 °C to 1100 °C, CVD deposition of metallic Titanium or Tantalum layers and their carbides, nitrides or borides are possible.



Coating examples:




  • TiNB-intermediate layer on X46Cr13 for optimal diamond adhesion.


  • TiB2 on graphene fibres for stabilization after Zirconium-melt infiltration.


  • Ta on graphene to increase the chemical stability.


Publications

Kütemeyer, M., Helmreich, T., Rosiwal, S., & Koch, D. (2018). Influence of zirconium-based alloys on manufacturing and mechanical properties of ultra high temperature ceramic matrix composites. Advances in Applied Ceramics, 117(sup1: UHTC IV), 62-69. https://dx.doi.org/10.1080/17436753.2018.1509810
Kütemeyer, M., Schomer, L., Helmreich, T., Rosiwal, S., & Koch, D. (2016). Fabrication of ultra high temperature ceramic matrix composites using a reactive melt infiltration process. Journal of the European Ceramic Society, 36(15), 3647-3655. https://dx.doi.org/10.1016/j.jeurceramsoc.2016.04.039

Last updated on 2018-21-11 at 13:27