Konferenz  /  20. Juni 2022  -  29. Juni 2022

International Conference on Modern Materials and Technologies

Während der 15. International Conference on Modern Materials and Technologies CIMTEC im italienischen Perugia findet vom 20. - 24. Juni 2022 der 15. International Ceramics Congress und vom 25. - 29. Juni 2022 das 9. Forum on New Materials statt. Die beiden Veranstaltungen beinhalten eine Reihe von Symposien und Konferenzen.

Bei der CIMTEC treffen sich Wissenschaftler*innen, Physiker*innen, Chemiker*innen und Expert*innen aus den anspruchsvollsten technischen Anwendungsbereichen moderner Werkstoffe. Der Bereich umfasst die Molekular- und Nanoskala bis hin zu komplexen integrierten Systemen.

Im Rahmen des International Ceramics Congress' stellt Markus Mejauschek in einem Vortrag »New Surface Boriding Technologies« seine aktuellen Forschungsergebnisse zum Gasborieren vor.

 

Dienstag, 21. Juni 2022, 15:20 Uhr

Symposium CG »Ceramic Thin Films and Coatings for Protective, Tribological and Multifunctional Applications«

CG-1:IL03

»New Surface Boriding Technologies«

Markus. Mejauschek M.Sc.

Boriding of materials with powder or paste-like precursors has been studied for many years. The process involves boron diffusing into the material at temperatures above 750 °C. Very hard and wear-resistant boride layers with a larger layer thickness are formed compared to conventional hard coatings. A disadvantage of this process are the resulting residues of the precursor on the material surface, which must be laboriously removed and disposed of. To get around this, gas boriding processes with BCL3 precursor and additional plasma support were developed.  However, the problem here was the formation of pores and the technology was not suitable for the successful treatment of high-alloy steels and high temperature materials.  

With a new gas boriding process, it is possible to produce almost non-porous boride layers with columnar structure on various high-alloyed steels and high temperature materials. Coating thicknesses up to 20 μm with hardnesses above 2000 HV can be achieved. After post-hardening of the steels, according to the specifications of the material manufacturers, a fine-grained edge zone with further increased hardness could be observed. Ball-on disk-tests against steel, aluminium and titanium demonstrate a very good friction and wear behaviour. 

M. Mejauschek*, M. Weber, H. Paschke, C. Herrmann, Fraunhofer Institute for Surface Engineering an Thin Films IST, Braunschweig, Germany;  P. Kaestner and J. Vogtmann, Institute for Surface Technology, Braunschweig, Germany