1. Institut des Matériaux Jean Rouxel (IMN)Université de Nantes, CNRS 2 rue de la Houssinière, B.P. 32229 44322 Nantes cedex 3 France
2. Department of Condensed Matter PhysicsFaculty of Mathematics and PhysicsCharles University Ke Karlovu 5 121 16 Praha 2 Czech Republic
3. Institute of Materials Science, Advanced Electron MicroscopyTechnische Universität Darmstadt Alarich-Weiss-Strasse 2 64287 Darmstadt Germany
4. Department of Materials Science and EngineeringNew York State College of CeramicsAlfred University Alfred NY 14802 USA
5. Department of Mechanical EngineeringStevens Institute of Technology Hoboken NJ 07030 USA