1. Chair of Nonferrous Metallurgy; Department of Metallurgy; Montanuniversitaet Leoben; Franz-Josef-Str. 18 8700 Leoben Austria
2. Scientific Center of Optical and Electron Microscopy; ETH Zurich 8093 Zurich Switzerland
3. Laboratory of Metal Physics and Technology; Department of Materials; ETH Zurich 8093 Zurich Switzerland