1. Department of Materials, Faculty of Material Sciences and Technology of the Slovak University of Technology in Trnava, J. Bottu 25, Trnava 917 24, Slovakia (Corresponding author), e-mail: p.jurci@seznam.cz, https://orcid.org/0000-0002-4776-6922
2. Department of Materials, Faculty of Material Sciences and Technology of the Slovak University of Technology in Trnava, J. Bottu 25, Trnava 917 24, Slovakia