1. Chair of Structural and Functional Ceramics, Department of Materials Science Montanuniversität Leoben Leoben Austria
2. Federal Institute for Materials Research and Testing (BAM) Berlin Germany
3. Department of Materials Science and Engineering University of Illinois at Urbana‐Champaign Urbana Illinois USA
4. Department of Materials Engineering Technical University of Munich Garchingen Germany
5. Institute of Non‐Metallic Materials, Clausthal University of Technology Clausthal‐Zellerfeld Germany