1. PPGEM/UFRGS (Program of Postgraduate Studies in Mining Metals and Materials Engineering of the University of Rio Grande do Sul) Av. Bento Gonçalves, 9500‐Setor 4‐Prédio 74‐sala 211, Campus do Vale, CEP 91501‐970 Porto Alegre Brazil
2. Institute of Iron and Steel Technology (IEST) Technische Universität Bergakademie Freiberg Leipziger Straße 34 Freiberg Saxony 09599 Germany