1. Institute of Materials Science, University of Silesia, Bankowa 12, 40-007 Katowice, Poland
2. Department of Material Science, University of Silesia, Żeromskiego 3, 41-200 Sosnowiec, Poland
3. Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego 18a, 44-200 Gliwice, Poland