Presentation - Conference Presentation

English

Richter, Sophie 
Danner, David 
Kutrowatz, Philip 
Hahn, Rainer 
Ntemou, Eleni 
Primetzhofer, Daniel 
Wojcik, Tomasz 
Jerg, Carmen 
Kolozsvári, Szilárd 
Polcik, Peter 
Ramm, Jürgen 
Riedl-Tragenreif, Helmut 

E308-01-2 - Forschungsgruppe Angewandte Oberflächentechnik 
E308-03-1 - Forschungsgruppe Metallurgische Verarbeitungstechnologien 

21-May-2024

50th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 2024) 

19-May-2024 - 24-May-2024

San Diego, CA, United States of America (the)

Oxidation Resistance; PVD thin films; Transition metal carbides; Coatings

Röntgenzentrum 
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie 

Oberflächentechnik von hochbeanspruchten Präzisionskomponenten: CDL-SEC (Christian Doppler Forschungsgesells) 

Transition metal carbides (TMCs) are known for their mechanical properties‚ high-temperature stability and melting points exceeding 3000 °C. However‚ their exceptional high-temperature properties are offset by their sensitivity to oxidation. This study focuses on an alloying strategy incorporating Al and Si as strong oxide-forming elements to extend their oxidation resistance in demanding environments. Using a combinatorial physical vapor deposition (PVD) approach‚ group IV to VI transition metal carbides were systematically investigated by co-sputtering Al and Si next to TMCs. This comprehensive study covers a wide range of structural and chemical compositions‚ which are thoroughly characterized by X-ray diffraction (XRD)‚ nanoindentation‚ and elastic recoil detection analysis (ERDA) calibrated X-ray fluorescence (XRF) to achieve precise chemical quantification. Subsequently‚ a subset of selected compositions based on structural and mechanical criteria is analyzed concerning their oxidization resistance. In-situ XRD monitors the formation of oxide scales in synthetic air environments up to 1200 °C. In addition‚ conventional oxidation experiments in a box furnace contribute to a comprehensive understanding of the oxidation behavior of these TMCs. The formed scales are thoroughly described by transmission electron microscopy unraveling details on the diffusion kinetics of the oxide formers. This research not only explores the fundamental mechanisms that determine the scale formation of TMCs‚ but also provides valuable insights into the growth mechanism of ternary face-centered cubic (fcc) TM-Al/Si-C solid solutions synthesized by PVD techniques.

Materials Characterization: 30%
Surfaces and Interfaces: 70%

2100 - Nanotechnologie: 40%
2050 - Werkstofftechnik: 60%