Speaker
Description
By applying ion irradiation it is possible to produce materials at room temperature for which generally high temperatures are needed. If we irradiate a layer structure at the interfaces atomic mixing, or ion mixing happens and compound formation might occur as well. Previously we have shown that this method can be applied to produce SiC-rich protective nano-coatings which are applied in harsh environments. The produced coatings exhibited excellent corrosion resistant properties and reasonable good wear resistance as well [1,2]. Now we deal with the possible extension of the method. C/W multilayer structures - with individual thicknesses of 10-20 nm - are irradiated by xenon and argon atoms. The irradiation conditions are chosen with the help of simulation programs (TRIDYN, SRIM). The layer thickness and the in-depth distribution of the formed tungsten-carbide is investigated by Auger electron spectroscopy depth profiling. We show that the thickness of the carbide-rich region can be tailored by changing the ion irradiation conditions and the layer structure. The corrosion resistance of the layers is tested by potentiodynamic corrosion test. Process-property relationships are discussed.
Acknowledgements
RADIATE project, HZDR-Dresden and project funding of Centre for Energy Research is highly acknowledged.
References: [1] A.S. Racz, M. Menyhard, ACS Appl. Mater. Interfaces, 10 (2018) 22851.
[2] A.S.Racz, D.Dworschak, M.Valtiner, M.Menyhard, Surf. Coat. Technol., 386 (2020).
| Speaker Country | Hungary |
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