Ing. Pavol Čekan, PhD., Ing. Jozef Harangozó, PhD., Ing. Zuzana Szabová, PhD., doc. Ing. Richard Kuracina, PhD., prof. Ing. Karol Balog, PhD. Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Safety, Environment and Quality, Paulínska 16, 91724 Trnava, Slovak Republic