**Author details**

Roman Koleňák\*, Martin Provazník and Igor Kostolný Faculty of Materials Science and Technology, Slovak University of Technology, Trnava, Slovak Republic

\*Address all correspondence to: roman.kolenak@stuba.sk

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
