Abstract
Compression tests with MgO single crystals, doped with Fe3+ to different levels, have been performed in various temperature ranges. In addition, microstructural aspects, and in particular the dislocation arrangement, have been studied by both optical and transmission electron microscopy. At high temperature, development of a steady-state creep process and a corresponding substructure is observed and interpreted by diffusion-controlled dislocation reactions similar to those in metals. At low temperatures, solid solution hardening due to point-defect complexes (dipole hardening, induced Snoek effect) has been found. At higher Fe3+ levels, spinel-phase precipitation causes particle hardening, the coherent spinel particles being cut by the dislocations in pairs.
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Ilschner, B., Reppich, B. (1974). Development of Substructures during Creep and Effect of Ionic Defects and Precipitates on the Strength of Magnesium Oxide. In: Seltzer, M.S., Jaffee, R.I. (eds) Defects and Transport in Oxides. Battelle Institute Materials Science Colloquia. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8723-1_24
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DOI: https://doi.org/10.1007/978-1-4615-8723-1_24
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