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Stability of the F2-(Al-Pd-Mn) phase |
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| Authors: | A. Letoublon T. Ishimasa M. De Boissieu M. Boudard B. Hennion M. Mori |
| Affiliation: | 1. A. F. Ioffe Physical–Technical Institute of Russian Academy of Sciences , Polytekchnicheskaya Street 26, 194021 Sankt-Petersburg, Russia gavrilyuk@mail.ioffe.ru;3. Institute of Applied Physics of Technical University of Braunschweig , Mendelssohnstrasse 2, 38106 Braunschweig, Germany |
| Abstract: | The stability of the F2-(Al-Pd-Mn) phase has been studied by in-situ neutron diffraction on a single quasicrystal with composition Al69.8Pd21.4Mn8.8. We find that the F2 phase is not stable and corresponds to a transient state in the process of the transformation of the icosahedral phase to the F2M phase. The icosahedral-to-F2Mphase transition occurs at around 715oC. In the F2 phase a large amount of diffuse scattering is located close to the icosahedral Bragg reflection in place of the S 1 superstructure reflections characteristic of the F2m phase. |
| Keywords: | heterostructures HRTEM interfacial structures image processing dislocations |