[1] National R and D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, 102 Biruintei Blvd, Pantelimon
[2] National R and D Institute for Nonferrous and Rare Metals, Physical and Chemical Laboratory, 102 Biruintei Blvd, Pantelimon
[3] National R and D Institute for Nonferrous and Rare Metals, Microscopic Characterization Laboratory, 102 Biruintei Blvd, Pantelimon
[4] Polytechnic University of Bucharest, Centre for Research and Expertizing of Special Materials, 313 Splaiul Independentei, Sector 6, Bucharest
[5] Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, 67 Profesor Dimitrie Mangeron Blvd., Iasi