Structure determination of Fe-Al-Ge alloys

GARGICEVICH, D.; GALVAN JOSA, V. M.; BLANCO, M. C.; LAMBRI, O. A.; CUELLO, G. J.

Journal of Physics: Conference Series

IOP Science

Lugar: Pamplona; Año: 2015 vol. 663 p. 1 - 5

1742-6588

We studied the crystalline structure of Fe - 8at.%Al - 4at.%Ge alloy between 300and 1300 K and its relation to the mechanical response by means of neutron diraction and mechanical spectroscopy. At room temperature we observe a Fe3Al-type ordered structure with a deciency of Al in the 8c sites. The Ge atoms are distributed in the 4a and Al atoms in 8c sites. At high temperature we observe an order-disorder transformation when the crystal structure becomes Fe- type. This loss of order gives rise to the hysteresis behavior of damping between the heating and cooling runs.