Titanium- and Tantalum-based CVD coatings
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.
- 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.
Active researcher(s):M.Sc. Thomas Helmreich
Influence of zirconium-based alloys on manufacturing and mechanical properties of ultra high temperature ceramic matrix composites
In: Advances in Applied Ceramics 117 (2018), p. 62-69
DOI: 10.1080/17436753.2018.1509810 , , , :
Fabrication of ultra high temperature ceramic matrix composites using a reactive melt infiltration process
In: Journal of the European Ceramic Society 36 (2016), p. 3647-3655
DOI: 10.1016/j.jeurceramsoc.2016.04.039 , , , , :